Finding the Fourth Proportional to 105,200.08, 145,170.76 and 57,444.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,200.08 : 145,170.76 = 57,444.24 : x
2. Step 2: Convert to fraction form
   105,200.08/145,170.76 = 57,444.24/x
3. Step 3: Cross multiply
   105,200.08x = 145,170.76 × 57,444.24
4. Step 4: Simplify right side
   105,200.08x = 8,339,223,978.42
5. Step 5: Solve for x
   x = 8,339,223,978.42/105,200.08
6. Step 6: Final answer
   x = 79,270.13