Finding the Fourth Proportional to 93.50, 139.59 and 87.33

Step by Step Solution

1. Step 1: Write the proportion equation
   93.50 : 139.59 = 87.33 : x
2. Step 2: Convert to fraction form
   93.50/139.59 = 87.33/x
3. Step 3: Cross multiply
   93.50x = 139.59 × 87.33
4. Step 4: Simplify right side
   93.50x = 12,189.83
5. Step 5: Solve for x
   x = 12,189.83/93.50
6. Step 6: Final answer
   x = 130.37