Finding the Fourth Proportional to 139,337.09, 209,004.52 and 82,802.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,337.09 : 209,004.52 = 82,802.80 : x
2. Step 2: Convert to fraction form
   139,337.09/209,004.52 = 82,802.80/x
3. Step 3: Cross multiply
   139,337.09x = 209,004.52 × 82,802.80
4. Step 4: Simplify right side
   139,337.09x = 17,306,159,468.66
5. Step 5: Solve for x
   x = 17,306,159,468.66/139,337.09
6. Step 6: Final answer
   x = 124,203.54