Finding the Fourth Proportional to 139,521.52, 209,245.40 and 60,617.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,521.52 : 209,245.40 = 60,617.32 : x
2. Step 2: Convert to fraction form
   139,521.52/209,245.40 = 60,617.32/x
3. Step 3: Cross multiply
   139,521.52x = 209,245.40 × 60,617.32
4. Step 4: Simplify right side
   139,521.52x = 12,683,895,370.33
5. Step 5: Solve for x
   x = 12,683,895,370.33/139,521.52
6. Step 6: Final answer
   x = 90,909.96