Finding the Fourth Proportional to 12,210.27, 18,316.89 and 3,445.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210.27 : 18,316.89 = 3,445.19 : x
2. Step 2: Convert to fraction form
   12,210.27/18,316.89 = 3,445.19/x
3. Step 3: Cross multiply
   12,210.27x = 18,316.89 × 3,445.19
4. Step 4: Simplify right side
   12,210.27x = 63,105,156.28
5. Step 5: Solve for x
   x = 63,105,156.28/12,210.27
6. Step 6: Final answer
   x = 5,168.20