Finding the Fourth Proportional to 139,973.47, 209,443.52 and 83,853.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,973.47 : 209,443.52 = 83,853.23 : x
2. Step 2: Convert to fraction form
   139,973.47/209,443.52 = 83,853.23/x
3. Step 3: Cross multiply
   139,973.47x = 209,443.52 × 83,853.23
4. Step 4: Simplify right side
   139,973.47x = 17,562,514,816.99
5. Step 5: Solve for x
   x = 17,562,514,816.99/139,973.47
6. Step 6: Final answer
   x = 125,470.31