Finding the Fourth Proportional to 1,152,372.94, 1,590,127.94 and 643,096.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,372.94 : 1,590,127.94 = 643,096.78 : x
2. Step 2: Convert to fraction form
   1,152,372.94/1,590,127.94 = 643,096.78/x
3. Step 3: Cross multiply
   1,152,372.94x = 1,590,127.94 × 643,096.78
4. Step 4: Simplify right side
   1,152,372.94x = 1,022,606,158,002.03
5. Step 5: Solve for x
   x = 1,022,606,158,002.03/1,152,372.94
6. Step 6: Final answer
   x = 887,391.68