Finding the Fourth Proportional to 78.59, 108.43 and 52.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78.59 : 108.43 = 52.71 : x
2. Step 2: Convert to fraction form
   78.59/108.43 = 52.71/x
3. Step 3: Cross multiply
   78.59x = 108.43 × 52.71
4. Step 4: Simplify right side
   78.59x = 5,715.21
5. Step 5: Solve for x
   x = 5,715.21/78.59
6. Step 6: Final answer
   x = 72.73