Finding the Fourth Proportional to 1,152,373.94, 1,590,129.32 and 643,097.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,373.94 : 1,590,129.32 = 643,097.78 : x
2. Step 2: Convert to fraction form
   1,152,373.94/1,590,129.32 = 643,097.78/x
3. Step 3: Cross multiply
   1,152,373.94x = 1,590,129.32 × 643,097.78
4. Step 4: Simplify right side
   1,152,373.94x = 1,022,608,635,604.91
5. Step 5: Solve for x
   x = 1,022,608,635,604.91/1,152,373.94
6. Step 6: Final answer
   x = 887,393.06