Finding the Fourth Proportional to 115,116.72, 172,713.50 and 51,066.02

Step by Step Solution

1. Step 1: Write the proportion equation
   115,116.72 : 172,713.50 = 51,066.02 : x
2. Step 2: Convert to fraction form
   115,116.72/172,713.50 = 51,066.02/x
3. Step 3: Cross multiply
   115,116.72x = 172,713.50 × 51,066.02
4. Step 4: Simplify right side
   115,116.72x = 8,819,791,413.22
5. Step 5: Solve for x
   x = 8,819,791,413.22/115,116.72
6. Step 6: Final answer
   x = 76,616.08