Finding the Fourth Proportional to 2,115,917.97, 2,920,860.59 and 1,428,520.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115,917.97 : 2,920,860.59 = 1,428,520.86 : x
2. Step 2: Convert to fraction form
   2,115,917.97/2,920,860.59 = 1,428,520.86/x
3. Step 3: Cross multiply
   2,115,917.97x = 2,920,860.59 × 1,428,520.86
4. Step 4: Simplify right side
   2,115,917.97x = 4,172,510,274,824.30
5. Step 5: Solve for x
   x = 4,172,510,274,824.30/2,115,917.97
6. Step 6: Final answer
   x = 1,971,962.21