Finding the Fourth Proportional to 12,200.38, 18,310.29 and 4,806.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.38 : 18,310.29 = 4,806.70 : x
2. Step 2: Convert to fraction form
   12,200.38/18,310.29 = 4,806.70/x
3. Step 3: Cross multiply
   12,200.38x = 18,310.29 × 4,806.70
4. Step 4: Simplify right side
   12,200.38x = 88,012,070.94
5. Step 5: Solve for x
   x = 88,012,070.94/12,200.38
6. Step 6: Final answer
   x = 7,213.88