Finding the Fourth Proportional to 89,691.91, 134,471.98 and 42,977.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89,691.91 : 134,471.98 = 42,977.59 : x
2. Step 2: Convert to fraction form
   89,691.91/134,471.98 = 42,977.59/x
3. Step 3: Cross multiply
   89,691.91x = 134,471.98 × 42,977.59
4. Step 4: Simplify right side
   89,691.91x = 5,779,281,622.93
5. Step 5: Solve for x
   x = 5,779,281,622.93/89,691.91
6. Step 6: Final answer
   x = 64,434.81