Finding the Fourth Proportional to 287,818.56, 431,777.76 and 88,134.24

Step by Step Solution

1. Step 1: Write the proportion equation
   287,818.56 : 431,777.76 = 88,134.24 : x
2. Step 2: Convert to fraction form
   287,818.56/431,777.76 = 88,134.24/x
3. Step 3: Cross multiply
   287,818.56x = 431,777.76 × 88,134.24
4. Step 4: Simplify right side
   287,818.56x = 38,054,404,726.50
5. Step 5: Solve for x
   x = 38,054,404,726.50/287,818.56
6. Step 6: Final answer
   x = 132,216.65