Finding the Fourth Proportional to 52.59, 72.50 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52.59 : 72.50 = 42.18 : x
2. Step 2: Convert to fraction form
   52.59/72.50 = 42.18/x
3. Step 3: Cross multiply
   52.59x = 72.50 × 42.18
4. Step 4: Simplify right side
   52.59x = 3,057.84
5. Step 5: Solve for x
   x = 3,057.84/52.59
6. Step 6: Final answer
   x = 58.14