Finding the Fourth Proportional to 13,331.32, 18,388.89 and 7,949.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,331.32 : 18,388.89 = 7,949.99 : x
2. Step 2: Convert to fraction form
   13,331.32/18,388.89 = 7,949.99/x
3. Step 3: Cross multiply
   13,331.32x = 18,388.89 × 7,949.99
4. Step 4: Simplify right side
   13,331.32x = 146,191,491.61
5. Step 5: Solve for x
   x = 146,191,491.61/13,331.32
6. Step 6: Final answer
   x = 10,966.02