Finding the Fourth Proportional to 112.71, 168.93 and 61.35

Step by Step Solution

1. Step 1: Write the proportion equation
   112.71 : 168.93 = 61.35 : x
2. Step 2: Convert to fraction form
   112.71/168.93 = 61.35/x
3. Step 3: Cross multiply
   112.71x = 168.93 × 61.35
4. Step 4: Simplify right side
   112.71x = 10,363.86
5. Step 5: Solve for x
   x = 10,363.86/112.71
6. Step 6: Final answer
   x = 91.95