Finding the Fourth Proportional to 139.32, 209.01 and 43.14

Step by Step Solution

1. Step 1: Write the proportion equation
   139.32 : 209.01 = 43.14 : x
2. Step 2: Convert to fraction form
   139.32/209.01 = 43.14/x
3. Step 3: Cross multiply
   139.32x = 209.01 × 43.14
4. Step 4: Simplify right side
   139.32x = 9,016.69
5. Step 5: Solve for x
   x = 9,016.69/139.32
6. Step 6: Final answer
   x = 64.72