Finding the Fourth Proportional to 105,443.10, 145,513.29 and 57,697.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,443.10 : 145,513.29 = 57,697.24 : x
2. Step 2: Convert to fraction form
   105,443.10/145,513.29 = 57,697.24/x
3. Step 3: Cross multiply
   105,443.10x = 145,513.29 × 57,697.24
4. Step 4: Simplify right side
   105,443.10x = 8,395,715,360.56
5. Step 5: Solve for x
   x = 8,395,715,360.56/105,443.10
6. Step 6: Final answer
   x = 79,623.19