Finding the Fourth Proportional to 93.50, 139.83 and 91.34

Step by Step Solution

1. Step 1: Write the proportion equation
   93.50 : 139.83 = 91.34 : x
2. Step 2: Convert to fraction form
   93.50/139.83 = 91.34/x
3. Step 3: Cross multiply
   93.50x = 139.83 × 91.34
4. Step 4: Simplify right side
   93.50x = 12,771.55
5. Step 5: Solve for x
   x = 12,771.55/93.50
6. Step 6: Final answer
   x = 136.60