Finding the Fourth Proportional to 89.98, 124.17 and 53.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89.98 : 124.17 = 53.15 : x
2. Step 2: Convert to fraction form
   89.98/124.17 = 53.15/x
3. Step 3: Cross multiply
   89.98x = 124.17 × 53.15
4. Step 4: Simplify right side
   89.98x = 6,600.15
5. Step 5: Solve for x
   x = 6,600.15/89.98
6. Step 6: Final answer
   x = 73.35