Finding the Fourth Proportional to 139,632.30, 209,456.55 and 39,799.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,632.30 : 209,456.55 = 39,799.80 : x
2. Step 2: Convert to fraction form
   139,632.30/209,456.55 = 39,799.80/x
3. Step 3: Cross multiply
   139,632.30x = 209,456.55 × 39,799.80
4. Step 4: Simplify right side
   139,632.30x = 8,336,328,798.69
5. Step 5: Solve for x
   x = 8,336,328,798.69/139,632.30
6. Step 6: Final answer
   x = 59,702.01