Finding the Fourth Proportional to 1,145,456.42, 1,580,733.54 and 636,158.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145,456.42 : 1,580,733.54 = 636,158.78 : x
2. Step 2: Convert to fraction form
   1,145,456.42/1,580,733.54 = 636,158.78/x
3. Step 3: Cross multiply
   1,145,456.42x = 1,580,733.54 × 636,158.78
4. Step 4: Simplify right side
   1,145,456.42x = 1,005,597,520,311.48
5. Step 5: Solve for x
   x = 1,005,597,520,311.48/1,145,456.42
6. Step 6: Final answer
   x = 877,901.16