Finding the Fourth Proportional to 9,819.57, 14,782.77 and 8,947.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.57 : 14,782.77 = 8,947.69 : x
2. Step 2: Convert to fraction form
   9,819.57/14,782.77 = 8,947.69/x
3. Step 3: Cross multiply
   9,819.57x = 14,782.77 × 8,947.69
4. Step 4: Simplify right side
   9,819.57x = 132,271,643.30
5. Step 5: Solve for x
   x = 132,271,643.30/9,819.57
6. Step 6: Final answer
   x = 13,470.21