Finding the Fourth Proportional to 28,482.72, 42,728.94 and 8,760.84

Step by Step Solution

1. Step 1: Write the proportion equation
   28,482.72 : 42,728.94 = 8,760.84 : x
2. Step 2: Convert to fraction form
   28,482.72/42,728.94 = 8,760.84/x
3. Step 3: Cross multiply
   28,482.72x = 42,728.94 × 8,760.84
4. Step 4: Simplify right side
   28,482.72x = 374,341,406.71
5. Step 5: Solve for x
   x = 374,341,406.71/28,482.72
6. Step 6: Final answer
   x = 13,142.75