Finding the Fourth Proportional to 12,806.88, 17,674.90 and 7,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.88 : 17,674.90 = 7,430.50 : x
2. Step 2: Convert to fraction form
   12,806.88/17,674.90 = 7,430.50/x
3. Step 3: Cross multiply
   12,806.88x = 17,674.90 × 7,430.50
4. Step 4: Simplify right side
   12,806.88x = 131,333,344.45
5. Step 5: Solve for x
   x = 131,333,344.45/12,806.88
6. Step 6: Final answer
   x = 10,254.91