Finding the Fourth Proportional to 13,404.26, 18,498.72 and 7,740.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.26 : 18,498.72 = 7,740.04 : x
2. Step 2: Convert to fraction form
   13,404.26/18,498.72 = 7,740.04/x
3. Step 3: Cross multiply
   13,404.26x = 18,498.72 × 7,740.04
4. Step 4: Simplify right side
   13,404.26x = 143,180,873.83
5. Step 5: Solve for x
   x = 143,180,873.83/13,404.26
6. Step 6: Final answer
   x = 10,681.74