Finding the Fourth Proportional to 115,131.72, 172,720.87 and 48,572.00

Step by Step Solution

1. Step 1: Write the proportion equation
   115,131.72 : 172,720.87 = 48,572.00 : x
2. Step 2: Convert to fraction form
   115,131.72/172,720.87 = 48,572.00/x
3. Step 3: Cross multiply
   115,131.72x = 172,720.87 × 48,572.00
4. Step 4: Simplify right side
   115,131.72x = 8,389,397,112.61
5. Step 5: Solve for x
   x = 8,389,397,112.61/115,131.72
6. Step 6: Final answer
   x = 72,867.82