Finding the Fourth Proportional to 72,572.49, 100,132.52 and 42,340.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,572.49 : 100,132.52 = 42,340.56 : x
2. Step 2: Convert to fraction form
   72,572.49/100,132.52 = 42,340.56/x
3. Step 3: Cross multiply
   72,572.49x = 100,132.52 × 42,340.56
4. Step 4: Simplify right side
   72,572.49x = 4,239,666,759.31
5. Step 5: Solve for x
   x = 4,239,666,759.31/72,572.49
6. Step 6: Final answer
   x = 58,419.75