Finding the Fourth Proportional to 9,790.68, 14,680.50 and 3,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,790.68 : 14,680.50 = 3,215.10 : x
2. Step 2: Convert to fraction form
   9,790.68/14,680.50 = 3,215.10/x
3. Step 3: Cross multiply
   9,790.68x = 14,680.50 × 3,215.10
4. Step 4: Simplify right side
   9,790.68x = 47,199,275.55
5. Step 5: Solve for x
   x = 47,199,275.55/9,790.68
6. Step 6: Final answer
   x = 4,820.84