Finding the Fourth Proportional to 105,112.72, 157,665.24 and 31,238.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105,112.72 : 157,665.24 = 31,238.80 : x
2. Step 2: Convert to fraction form
   105,112.72/157,665.24 = 31,238.80/x
3. Step 3: Cross multiply
   105,112.72x = 157,665.24 × 31,238.80
4. Step 4: Simplify right side
   105,112.72x = 4,925,272,899.31
5. Step 5: Solve for x
   x = 4,925,272,899.31/105,112.72
6. Step 6: Final answer
   x = 46,857.06