Finding the Fourth Proportional to 12,200.23, 18,298.71 and 3,435.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.23 : 18,298.71 = 3,435.91 : x
2. Step 2: Convert to fraction form
   12,200.23/18,298.71 = 3,435.91/x
3. Step 3: Cross multiply
   12,200.23x = 18,298.71 × 3,435.91
4. Step 4: Simplify right side
   12,200.23x = 62,872,720.68
5. Step 5: Solve for x
   x = 62,872,720.68/12,200.23
6. Step 6: Final answer
   x = 5,153.40