Finding the Fourth Proportional to 48,737.30, 72,960.15 and 42,905.30

Step by Step Solution

1. Step 1: Write the proportion equation
   48,737.30 : 72,960.15 = 42,905.30 : x
2. Step 2: Convert to fraction form
   48,737.30/72,960.15 = 42,905.30/x
3. Step 3: Cross multiply
   48,737.30x = 72,960.15 × 42,905.30
4. Step 4: Simplify right side
   48,737.30x = 3,130,377,123.80
5. Step 5: Solve for x
   x = 3,130,377,123.80/48,737.30
6. Step 6: Final answer
   x = 64,229.60