Finding the Fourth Proportional to 13,372.40, 18,454.06 and 7,404.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,372.40 : 18,454.06 = 7,404.18 : x
2. Step 2: Convert to fraction form
   13,372.40/18,454.06 = 7,404.18/x
3. Step 3: Cross multiply
   13,372.40x = 18,454.06 × 7,404.18
4. Step 4: Simplify right side
   13,372.40x = 136,637,191.23
5. Step 5: Solve for x
   x = 136,637,191.23/13,372.40
6. Step 6: Final answer
   x = 10,217.85