Finding the Fourth Proportional to 90.00, 124.18 and 53.15

Step by Step Solution

1. Step 1: Write the proportion equation
   90.00 : 124.18 = 53.15 : x
2. Step 2: Convert to fraction form
   90.00/124.18 = 53.15/x
3. Step 3: Cross multiply
   90.00x = 124.18 × 53.15
4. Step 4: Simplify right side
   90.00x = 6,599.76
5. Step 5: Solve for x
   x = 6,599.76/90.00
6. Step 6: Final answer
   x = 73.33