Finding the Fourth Proportional to 13,325.78, 18,391.98 and 7,948.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,325.78 : 18,391.98 = 7,948.56 : x
2. Step 2: Convert to fraction form
   13,325.78/18,391.98 = 7,948.56/x
3. Step 3: Cross multiply
   13,325.78x = 18,391.98 × 7,948.56
4. Step 4: Simplify right side
   13,325.78x = 146,189,756.55
5. Step 5: Solve for x
   x = 146,189,756.55/13,325.78
6. Step 6: Final answer
   x = 10,970.45