Finding the Fourth Proportional to 93.52, 139.31 and 91.42

Step by Step Solution

1. Step 1: Write the proportion equation
   93.52 : 139.31 = 91.42 : x
2. Step 2: Convert to fraction form
   93.52/139.31 = 91.42/x
3. Step 3: Cross multiply
   93.52x = 139.31 × 91.42
4. Step 4: Simplify right side
   93.52x = 12,735.72
5. Step 5: Solve for x
   x = 12,735.72/93.52
6. Step 6: Final answer
   x = 136.18