Finding the Fourth Proportional to 1,152,371.94, 1,590,126.56 and 643,095.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,371.94 : 1,590,126.56 = 643,095.78 : x
2. Step 2: Convert to fraction form
   1,152,371.94/1,590,126.56 = 643,095.78/x
3. Step 3: Cross multiply
   1,152,371.94x = 1,590,126.56 × 643,095.78
4. Step 4: Simplify right side
   1,152,371.94x = 1,022,603,680,401.92
5. Step 5: Solve for x
   x = 1,022,603,680,401.92/1,152,371.94
6. Step 6: Final answer
   x = 887,390.30