Finding the Fourth Proportional to 82.76, 123.98 and 61.32

Step by Step Solution

1. Step 1: Write the proportion equation
   82.76 : 123.98 = 61.32 : x
2. Step 2: Convert to fraction form
   82.76/123.98 = 61.32/x
3. Step 3: Cross multiply
   82.76x = 123.98 × 61.32
4. Step 4: Simplify right side
   82.76x = 7,602.45
5. Step 5: Solve for x
   x = 7,602.45/82.76
6. Step 6: Final answer
   x = 91.86