Finding the Fourth Proportional to 1,389,621,856.96, 2,084,499,824.74 and 456,924,055.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,621,856.96 : 2,084,499,824.74 = 456,924,055.49 : x
2. Step 2: Convert to fraction form
   1,389,621,856.96/2,084,499,824.74 = 456,924,055.49/x
3. Step 3: Cross multiply
   1,389,621,856.96x = 2,084,499,824.74 × 456,924,055.49
4. Step 4: Simplify right side
   1,389,621,856.96x = 952,458,113,575,687,936
5. Step 5: Solve for x
   x = 952,458,113,575,687,936/1,389,621,856.96
6. Step 6: Final answer
   x = 685,408,126.54