Finding the Fourth Proportional to 105,410.55, 145,465.38 and 57,663.33

Step by Step Solution

1. Step 1: Write the proportion equation
   105,410.55 : 145,465.38 = 57,663.33 : x
2. Step 2: Convert to fraction form
   105,410.55/145,465.38 = 57,663.33/x
3. Step 3: Cross multiply
   105,410.55x = 145,465.38 × 57,663.33
4. Step 4: Simplify right side
   105,410.55x = 8,388,018,210.52
5. Step 5: Solve for x
   x = 8,388,018,210.52/105,410.55
6. Step 6: Final answer
   x = 79,574.75