Finding the Fourth Proportional to 2,115,978.30, 2,920,943.57 and 1,428,580.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115,978.30 : 2,920,943.57 = 1,428,580.92 : x
2. Step 2: Convert to fraction form
   2,115,978.30/2,920,943.57 = 1,428,580.92/x
3. Step 3: Cross multiply
   2,115,978.30x = 2,920,943.57 × 1,428,580.92
4. Step 4: Simplify right side
   2,115,978.30x = 4,172,804,252,498.68
5. Step 5: Solve for x
   x = 4,172,804,252,498.68/2,115,978.30
6. Step 6: Final answer
   x = 1,972,044.92