Finding the Fourth Proportional to 105,480.76, 145,559.88 and 57,733.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,480.76 : 145,559.88 = 57,733.12 : x
2. Step 2: Convert to fraction form
   105,480.76/145,559.88 = 57,733.12/x
3. Step 3: Cross multiply
   105,480.76x = 145,559.88 × 57,733.12
4. Step 4: Simplify right side
   105,480.76x = 8,403,626,019.23
5. Step 5: Solve for x
   x = 8,403,626,019.23/105,480.76
6. Step 6: Final answer
   x = 79,669.75