Finding the Fourth Proportional to 110.39, 152.15 and 83.86

Step by Step Solution

1. Step 1: Write the proportion equation
   110.39 : 152.15 = 83.86 : x
2. Step 2: Convert to fraction form
   110.39/152.15 = 83.86/x
3. Step 3: Cross multiply
   110.39x = 152.15 × 83.86
4. Step 4: Simplify right side
   110.39x = 12,758.50
5. Step 5: Solve for x
   x = 12,758.50/110.39
6. Step 6: Final answer
   x = 115.58