Finding the Fourth Proportional to 90,123.42, 135,101.46 and 42,760.77

Step by Step Solution

1. Step 1: Write the proportion equation
   90,123.42 : 135,101.46 = 42,760.77 : x
2. Step 2: Convert to fraction form
   90,123.42/135,101.46 = 42,760.77/x
3. Step 3: Cross multiply
   90,123.42x = 135,101.46 × 42,760.77
4. Step 4: Simplify right side
   90,123.42x = 5,777,042,457.72
5. Step 5: Solve for x
   x = 5,777,042,457.72/90,123.42
6. Step 6: Final answer
   x = 64,101.46