Finding the Fourth Proportional to 139.61, 209.39 and 62.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139.61 : 209.39 = 62.56 : x
2. Step 2: Convert to fraction form
   139.61/209.39 = 62.56/x
3. Step 3: Cross multiply
   139.61x = 209.39 × 62.56
4. Step 4: Simplify right side
   139.61x = 13,099.10
5. Step 5: Solve for x
   x = 13,099.10/139.61
6. Step 6: Final answer
   x = 93.83