Finding the Fourth Proportional to 72.61, 108.96 and 45.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72.61 : 108.96 = 45.52 : x
2. Step 2: Convert to fraction form
   72.61/108.96 = 45.52/x
3. Step 3: Cross multiply
   72.61x = 108.96 × 45.52
4. Step 4: Simplify right side
   72.61x = 4,959.86
5. Step 5: Solve for x
   x = 4,959.86/72.61
6. Step 6: Final answer
   x = 68.31