Finding the Fourth Proportional to 72.63, 108.98 and 61.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72.63 : 108.98 = 61.25 : x
2. Step 2: Convert to fraction form
   72.63/108.98 = 61.25/x
3. Step 3: Cross multiply
   72.63x = 108.98 × 61.25
4. Step 4: Simplify right side
   72.63x = 6,674.17
5. Step 5: Solve for x
   x = 6,674.17/72.63
6. Step 6: Final answer
   x = 91.89