Finding the Fourth Proportional to 1,978,872,223.88, 2,968,810,763.35 and 916,061,293.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978,872,223.88 : 2,968,810,763.35 = 916,061,293.86 : x
2. Step 2: Convert to fraction form
   1,978,872,223.88/2,968,810,763.35 = 916,061,293.86/x
3. Step 3: Cross multiply
   1,978,872,223.88x = 2,968,810,763.35 × 916,061,293.86
4. Step 4: Simplify right side
   1,978,872,223.88x = 2,719,612,629,096,763,392
5. Step 5: Solve for x
   x = 2,719,612,629,096,763,392/1,978,872,223.88
6. Step 6: Final answer
   x = 1,374,324,524.99