Finding the Fourth Proportional to 8,643.98, 12,967.89 and 2,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,643.98 : 12,967.89 = 2,487.50 : x
2. Step 2: Convert to fraction form
   8,643.98/12,967.89 = 2,487.50/x
3. Step 3: Cross multiply
   8,643.98x = 12,967.89 × 2,487.50
4. Step 4: Simplify right side
   8,643.98x = 32,257,626.38
5. Step 5: Solve for x
   x = 32,257,626.38/8,643.98
6. Step 6: Final answer
   x = 3,731.80