Finding the Fourth Proportional to 8,607.86, 12,918.02 and 3,061.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,607.86 : 12,918.02 = 3,061.25 : x
2. Step 2: Convert to fraction form
   8,607.86/12,918.02 = 3,061.25/x
3. Step 3: Cross multiply
   8,607.86x = 12,918.02 × 3,061.25
4. Step 4: Simplify right side
   8,607.86x = 39,545,273.42
5. Step 5: Solve for x
   x = 39,545,273.42/8,607.86
6. Step 6: Final answer
   x = 4,594.09