Finding the Fourth Proportional to 1,126,492.77, 1,554,500.57 and 643,038.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126,492.77 : 1,554,500.57 = 643,038.69 : x
2. Step 2: Convert to fraction form
   1,126,492.77/1,554,500.57 = 643,038.69/x
3. Step 3: Cross multiply
   1,126,492.77x = 1,554,500.57 × 643,038.69
4. Step 4: Simplify right side
   1,126,492.77x = 999,604,002,364.55
5. Step 5: Solve for x
   x = 999,604,002,364.55/1,126,492.77
6. Step 6: Final answer
   x = 887,359.45