Finding the Fourth Proportional to 99.50, 137.25 and 60.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99.50 : 137.25 = 60.69 : x
2. Step 2: Convert to fraction form
   99.50/137.25 = 60.69/x
3. Step 3: Cross multiply
   99.50x = 137.25 × 60.69
4. Step 4: Simplify right side
   99.50x = 8,329.70
5. Step 5: Solve for x
   x = 8,329.70/99.50
6. Step 6: Final answer
   x = 83.71