Finding the Fourth Proportional to 28,329.30, 42,494.90 and 8,607.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,329.30 : 42,494.90 = 8,607.83 : x
2. Step 2: Convert to fraction form
   28,329.30/42,494.90 = 8,607.83/x
3. Step 3: Cross multiply
   28,329.30x = 42,494.90 × 8,607.83
4. Step 4: Simplify right side
   28,329.30x = 365,788,619.55
5. Step 5: Solve for x
   x = 365,788,619.55/28,329.30
6. Step 6: Final answer
   x = 12,912.02