Finding the Fourth Proportional to 12,919.34, 17,828.69 and 7,545.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,919.34 : 17,828.69 = 7,545.50 : x
2. Step 2: Convert to fraction form
   12,919.34/17,828.69 = 7,545.50/x
3. Step 3: Cross multiply
   12,919.34x = 17,828.69 × 7,545.50
4. Step 4: Simplify right side
   12,919.34x = 134,526,380.40
5. Step 5: Solve for x
   x = 134,526,380.40/12,919.34
6. Step 6: Final answer
   x = 10,412.79