Finding the Fourth Proportional to 12,819.30, 17,690.58 and 7,154.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.30 : 17,690.58 = 7,154.52 : x
2. Step 2: Convert to fraction form
   12,819.30/17,690.58 = 7,154.52/x
3. Step 3: Cross multiply
   12,819.30x = 17,690.58 × 7,154.52
4. Step 4: Simplify right side
   12,819.30x = 126,567,608.42
5. Step 5: Solve for x
   x = 126,567,608.42/12,819.30
6. Step 6: Final answer
   x = 9,873.21