Finding the Fourth Proportional to 72,505.05, 100,060.28 and 42,285.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,505.05 : 100,060.28 = 42,285.57 : x
2. Step 2: Convert to fraction form
   72,505.05/100,060.28 = 42,285.57/x
3. Step 3: Cross multiply
   72,505.05x = 100,060.28 × 42,285.57
4. Step 4: Simplify right side
   72,505.05x = 4,231,105,974.16
5. Step 5: Solve for x
   x = 4,231,105,974.16/72,505.05
6. Step 6: Final answer
   x = 58,356.02