Finding the Fourth Proportional to 13,059.62, 18,008.50 and 9,278.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,059.62 : 18,008.50 = 9,278.85 : x
2. Step 2: Convert to fraction form
   13,059.62/18,008.50 = 9,278.85/x
3. Step 3: Cross multiply
   13,059.62x = 18,008.50 × 9,278.85
4. Step 4: Simplify right side
   13,059.62x = 167,098,123.83
5. Step 5: Solve for x
   x = 167,098,123.83/13,059.62
6. Step 6: Final answer
   x = 12,795.02