Finding the Fourth Proportional to 8,788.50, 12,126.17 and 5,386.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.50 : 12,126.17 = 5,386.23 : x
2. Step 2: Convert to fraction form
   8,788.50/12,126.17 = 5,386.23/x
3. Step 3: Cross multiply
   8,788.50x = 12,126.17 × 5,386.23
4. Step 4: Simplify right side
   8,788.50x = 65,314,313.71
5. Step 5: Solve for x
   x = 65,314,313.71/8,788.50
6. Step 6: Final answer
   x = 7,431.79