Finding the Fourth Proportional to 83.10, 124.37 and 61.47

Step by Step Solution

1. Step 1: Write the proportion equation
   83.10 : 124.37 = 61.47 : x
2. Step 2: Convert to fraction form
   83.10/124.37 = 61.47/x
3. Step 3: Cross multiply
   83.10x = 124.37 × 61.47
4. Step 4: Simplify right side
   83.10x = 7,644.72
5. Step 5: Solve for x
   x = 7,644.72/83.10
6. Step 6: Final answer
   x = 91.99