Finding the Fourth Proportional to 105,165.24, 145,131.50 and 57,422.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,165.24 : 145,131.50 = 57,422.24 : x
2. Step 2: Convert to fraction form
   105,165.24/145,131.50 = 57,422.24/x
3. Step 3: Cross multiply
   105,165.24x = 145,131.50 × 57,422.24
4. Step 4: Simplify right side
   105,165.24x = 8,333,775,824.56
5. Step 5: Solve for x
   x = 8,333,775,824.56/105,165.24
6. Step 6: Final answer
   x = 79,244.59