Finding the Fourth Proportional to 1,428,558.57, 1,970,849.61 and 816,382.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428,558.57 : 1,970,849.61 = 816,382.91 : x
2. Step 2: Convert to fraction form
   1,428,558.57/1,970,849.61 = 816,382.91/x
3. Step 3: Cross multiply
   1,428,558.57x = 1,970,849.61 × 816,382.91
4. Step 4: Simplify right side
   1,428,558.57x = 1,608,967,929,929.92
5. Step 5: Solve for x
   x = 1,608,967,929,929.92/1,428,558.57
6. Step 6: Final answer
   x = 1,126,287.69