Finding the Fourth Proportional to 14,002.81, 19,339.43 and 9,518.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,002.81 : 19,339.43 = 9,518.78 : x
2. Step 2: Convert to fraction form
   14,002.81/19,339.43 = 9,518.78/x
3. Step 3: Cross multiply
   14,002.81x = 19,339.43 × 9,518.78
4. Step 4: Simplify right side
   14,002.81x = 184,087,780.25
5. Step 5: Solve for x
   x = 184,087,780.25/14,002.81
6. Step 6: Final answer
   x = 13,146.49