Finding the Fourth Proportional to 28,298.84, 42,443.39 and 8,574.53

Step by Step Solution

1. Step 1: Write the proportion equation
   28,298.84 : 42,443.39 = 8,574.53 : x
2. Step 2: Convert to fraction form
   28,298.84/42,443.39 = 8,574.53/x
3. Step 3: Cross multiply
   28,298.84x = 42,443.39 × 8,574.53
4. Step 4: Simplify right side
   28,298.84x = 363,931,930.08
5. Step 5: Solve for x
   x = 363,931,930.08/28,298.84
6. Step 6: Final answer
   x = 12,860.31