Finding the Fourth Proportional to 8,322.30, 12,483.21 and 3,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,322.30 : 12,483.21 = 3,390.72 : x
2. Step 2: Convert to fraction form
   8,322.30/12,483.21 = 3,390.72/x
3. Step 3: Cross multiply
   8,322.30x = 12,483.21 × 3,390.72
4. Step 4: Simplify right side
   8,322.30x = 42,327,069.81
5. Step 5: Solve for x
   x = 42,327,069.81/8,322.30
6. Step 6: Final answer
   x = 5,085.98