Finding the Fourth Proportional to 139.89, 209.86 and 62.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139.89 : 209.86 = 62.94 : x
2. Step 2: Convert to fraction form
   139.89/209.86 = 62.94/x
3. Step 3: Cross multiply
   139.89x = 209.86 × 62.94
4. Step 4: Simplify right side
   139.89x = 13,209.22
5. Step 5: Solve for x
   x = 13,209.22/139.89
6. Step 6: Final answer
   x = 94.42