Finding the Fourth Proportional to 13,019.50, 17,961.95 and 9,624.66

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.50 : 17,961.95 = 9,624.66 : x
2. Step 2: Convert to fraction form
   13,019.50/17,961.95 = 9,624.66/x
3. Step 3: Cross multiply
   13,019.50x = 17,961.95 × 9,624.66
4. Step 4: Simplify right side
   13,019.50x = 172,877,605.56
5. Step 5: Solve for x
   x = 172,877,605.56/13,019.50
6. Step 6: Final answer
   x = 13,278.36