Finding the Fourth Proportional to 8,404.74, 12,618.27 and 7,180.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.74 : 12,618.27 = 7,180.02 : x
2. Step 2: Convert to fraction form
   8,404.74/12,618.27 = 7,180.02/x
3. Step 3: Cross multiply
   8,404.74x = 12,618.27 × 7,180.02
4. Step 4: Simplify right side
   8,404.74x = 90,599,430.97
5. Step 5: Solve for x
   x = 90,599,430.97/8,404.74
6. Step 6: Final answer
   x = 10,779.56