Finding the Fourth Proportional to 139.72, 209.42 and 62.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139.72 : 209.42 = 62.60 : x
2. Step 2: Convert to fraction form
   139.72/209.42 = 62.60/x
3. Step 3: Cross multiply
   139.72x = 209.42 × 62.60
4. Step 4: Simplify right side
   139.72x = 13,109.32
5. Step 5: Solve for x
   x = 13,109.32/139.72
6. Step 6: Final answer
   x = 93.83