Finding the Fourth Proportional to 28,479.94, 42,723.98 and 8,760.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,479.94 : 42,723.98 = 8,760.15 : x
2. Step 2: Convert to fraction form
   28,479.94/42,723.98 = 8,760.15/x
3. Step 3: Cross multiply
   28,479.94x = 42,723.98 × 8,760.15
4. Step 4: Simplify right side
   28,479.94x = 374,268,473.40
5. Step 5: Solve for x
   x = 374,268,473.40/28,479.94
6. Step 6: Final answer
   x = 13,141.48