Finding the Fourth Proportional to 115,131.69, 172,447.56 and 55,842.75

Step by Step Solution

1. Step 1: Write the proportion equation
   115,131.69 : 172,447.56 = 55,842.75 : x
2. Step 2: Convert to fraction form
   115,131.69/172,447.56 = 55,842.75/x
3. Step 3: Cross multiply
   115,131.69x = 172,447.56 × 55,842.75
4. Step 4: Simplify right side
   115,131.69x = 9,629,945,981.19
5. Step 5: Solve for x
   x = 9,629,945,981.19/115,131.69
6. Step 6: Final answer
   x = 83,642.88