Finding the Fourth Proportional to 72,725.76, 109,083.72 and 19,413.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,725.76 : 109,083.72 = 19,413.72 : x
2. Step 2: Convert to fraction form
   72,725.76/109,083.72 = 19,413.72/x
3. Step 3: Cross multiply
   72,725.76x = 109,083.72 × 19,413.72
4. Step 4: Simplify right side
   72,725.76x = 2,117,720,796.64
5. Step 5: Solve for x
   x = 2,117,720,796.64/72,725.76
6. Step 6: Final answer
   x = 29,119.27