Finding the Fourth Proportional to 8,603.16, 12,899.58 and 4,158.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,603.16 : 12,899.58 = 4,158.12 : x
2. Step 2: Convert to fraction form
   8,603.16/12,899.58 = 4,158.12/x
3. Step 3: Cross multiply
   8,603.16x = 12,899.58 × 4,158.12
4. Step 4: Simplify right side
   8,603.16x = 53,638,001.59
5. Step 5: Solve for x
   x = 53,638,001.59/8,603.16
6. Step 6: Final answer
   x = 6,234.69