Finding the Fourth Proportional to 62.56, 86.69 and 61.15

Step by Step Solution

1. Step 1: Write the proportion equation
   62.56 : 86.69 = 61.15 : x
2. Step 2: Convert to fraction form
   62.56/86.69 = 61.15/x
3. Step 3: Cross multiply
   62.56x = 86.69 × 61.15
4. Step 4: Simplify right side
   62.56x = 5,300.66
5. Step 5: Solve for x
   x = 5,300.66/62.56
6. Step 6: Final answer
   x = 84.73