Finding the Fourth Proportional to 86,633.91, 129,942.18 and 42,291.27

Step by Step Solution

1. Step 1: Write the proportion equation
   86,633.91 : 129,942.18 = 42,291.27 : x
2. Step 2: Convert to fraction form
   86,633.91/129,942.18 = 42,291.27/x
3. Step 3: Cross multiply
   86,633.91x = 129,942.18 × 42,291.27
4. Step 4: Simplify right side
   86,633.91x = 5,495,419,818.77
5. Step 5: Solve for x
   x = 5,495,419,818.77/86,633.91
6. Step 6: Final answer
   x = 63,432.67