Finding the Fourth Proportional to 139,632.57, 209,455.78 and 39,807.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,632.57 : 209,455.78 = 39,807.47 : x
2. Step 2: Convert to fraction form
   139,632.57/209,455.78 = 39,807.47/x
3. Step 3: Cross multiply
   139,632.57x = 209,455.78 × 39,807.47
4. Step 4: Simplify right side
   139,632.57x = 8,337,904,479.64
5. Step 5: Solve for x
   x = 8,337,904,479.64/139,632.57
6. Step 6: Final answer
   x = 59,713.18