Finding the Fourth Proportional to 139.55, 209.29 and 48.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139.55 : 209.29 = 48.24 : x
2. Step 2: Convert to fraction form
   139.55/209.29 = 48.24/x
3. Step 3: Cross multiply
   139.55x = 209.29 × 48.24
4. Step 4: Simplify right side
   139.55x = 10,096.15
5. Step 5: Solve for x
   x = 10,096.15/139.55
6. Step 6: Final answer
   x = 72.35