Finding the Fourth Proportional to 13,018.32, 17,949.60 and 10,782.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.32 : 17,949.60 = 10,782.72 : x
2. Step 2: Convert to fraction form
   13,018.32/17,949.60 = 10,782.72/x
3. Step 3: Cross multiply
   13,018.32x = 17,949.60 × 10,782.72
4. Step 4: Simplify right side
   13,018.32x = 193,545,510.91
5. Step 5: Solve for x
   x = 193,545,510.91/13,018.32
6. Step 6: Final answer
   x = 14,867.16