Finding the Fourth Proportional to 139.58, 209.23 and 62.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139.58 : 209.23 = 62.56 : x
2. Step 2: Convert to fraction form
   139.58/209.23 = 62.56/x
3. Step 3: Cross multiply
   139.58x = 209.23 × 62.56
4. Step 4: Simplify right side
   139.58x = 13,089.89
5. Step 5: Solve for x
   x = 13,089.89/139.58
6. Step 6: Final answer
   x = 93.78