Finding the Fourth Proportional to 100.02, 149.72 and 83.16

Step by Step Solution

1. Step 1: Write the proportion equation
   100.02 : 149.72 = 83.16 : x
2. Step 2: Convert to fraction form
   100.02/149.72 = 83.16/x
3. Step 3: Cross multiply
   100.02x = 149.72 × 83.16
4. Step 4: Simplify right side
   100.02x = 12,450.30
5. Step 5: Solve for x
   x = 12,450.30/100.02
6. Step 6: Final answer
   x = 124.48