Finding the Fourth Proportional to 61.24, 91.71 and 56.17

Step by Step Solution

1. Step 1: Write the proportion equation
   61.24 : 91.71 = 56.17 : x
2. Step 2: Convert to fraction form
   61.24/91.71 = 56.17/x
3. Step 3: Cross multiply
   61.24x = 91.71 × 56.17
4. Step 4: Simplify right side
   61.24x = 5,151.35
5. Step 5: Solve for x
   x = 5,151.35/61.24
6. Step 6: Final answer
   x = 84.12