Finding the Fourth Proportional to 105,560.66, 145,668.27 and 57,804.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,560.66 : 145,668.27 = 57,804.78 : x
2. Step 2: Convert to fraction form
   105,560.66/145,668.27 = 57,804.78/x
3. Step 3: Cross multiply
   105,560.66x = 145,668.27 × 57,804.78
4. Step 4: Simplify right side
   105,560.66x = 8,420,322,300.33
5. Step 5: Solve for x
   x = 8,420,322,300.33/105,560.66
6. Step 6: Final answer
   x = 79,767.62