Finding the Fourth Proportional to 12,253.40, 18,380.21 and 3,488.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,253.40 : 18,380.21 = 3,488.31 : x
2. Step 2: Convert to fraction form
   12,253.40/18,380.21 = 3,488.31/x
3. Step 3: Cross multiply
   12,253.40x = 18,380.21 × 3,488.31
4. Step 4: Simplify right side
   12,253.40x = 64,115,870.35
5. Step 5: Solve for x
   x = 64,115,870.35/12,253.40
6. Step 6: Final answer
   x = 5,232.50