Finding the Fourth Proportional to 90,123.92, 135,102.21 and 42,761.27

Step by Step Solution

1. Step 1: Write the proportion equation
   90,123.92 : 135,102.21 = 42,761.27 : x
2. Step 2: Convert to fraction form
   90,123.92/135,102.21 = 42,761.27/x
3. Step 3: Cross multiply
   90,123.92x = 135,102.21 × 42,761.27
4. Step 4: Simplify right side
   90,123.92x = 5,777,142,079.41
5. Step 5: Solve for x
   x = 5,777,142,079.41/90,123.92
6. Step 6: Final answer
   x = 64,102.21