Finding the Fourth Proportional to 139,974.47, 209,445.02 and 83,854.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,974.47 : 209,445.02 = 83,854.23 : x
2. Step 2: Convert to fraction form
   139,974.47/209,445.02 = 83,854.23/x
3. Step 3: Cross multiply
   139,974.47x = 209,445.02 × 83,854.23
4. Step 4: Simplify right side
   139,974.47x = 17,562,850,879.43
5. Step 5: Solve for x
   x = 17,562,850,879.43/139,974.47
6. Step 6: Final answer
   x = 125,471.82