Finding the Fourth Proportional to 2,158,360.89, 2,978,459.98 and 1,191,470.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,360.89 : 2,978,459.98 = 1,191,470.42 : x
2. Step 2: Convert to fraction form
   2,158,360.89/2,978,459.98 = 1,191,470.42/x
3. Step 3: Cross multiply
   2,158,360.89x = 2,978,459.98 × 1,191,470.42
4. Step 4: Simplify right side
   2,158,360.89x = 3,548,746,968,535.66
5. Step 5: Solve for x
   x = 3,548,746,968,535.66/2,158,360.89
6. Step 6: Final answer
   x = 1,644,186.09