Finding the Fourth Proportional to 8,759.78, 12,088.68 and 5,404.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.78 : 12,088.68 = 5,404.22 : x
2. Step 2: Convert to fraction form
   8,759.78/12,088.68 = 5,404.22/x
3. Step 3: Cross multiply
   8,759.78x = 12,088.68 × 5,404.22
4. Step 4: Simplify right side
   8,759.78x = 65,329,886.23
5. Step 5: Solve for x
   x = 65,329,886.23/8,759.78
6. Step 6: Final answer
   x = 7,457.94