Finding the Fourth Proportional to 816,105.30, 1,143,728.40 and 816,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   816,105.30 : 1,143,728.40 = 816,105.30 : x
2. Step 2: Convert to fraction form
   816,105.30/1,143,728.40 = 816,105.30/x
3. Step 3: Cross multiply
   816,105.30x = 1,143,728.40 × 816,105.30
4. Step 4: Simplify right side
   816,105.30x = 933,402,809,000.52
5. Step 5: Solve for x
   x = 933,402,809,000.52/816,105.30
6. Step 6: Final answer
   x = 1,143,728.40