Finding the Fourth Proportional to 139,952.32, 209,620.76 and 115,661.33

Step by Step Solution

1. Step 1: Write the proportion equation
   139,952.32 : 209,620.76 = 115,661.33 : x
2. Step 2: Convert to fraction form
   139,952.32/209,620.76 = 115,661.33/x
3. Step 3: Cross multiply
   139,952.32x = 209,620.76 × 115,661.33
4. Step 4: Simplify right side
   139,952.32x = 24,245,016,886.59
5. Step 5: Solve for x
   x = 24,245,016,886.59/139,952.32
6. Step 6: Final answer
   x = 173,237.69