Finding the Fourth Proportional to 12,667.62, 17,487.45 and 8,898.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.62 : 17,487.45 = 8,898.78 : x
2. Step 2: Convert to fraction form
   12,667.62/17,487.45 = 8,898.78/x
3. Step 3: Cross multiply
   12,667.62x = 17,487.45 × 8,898.78
4. Step 4: Simplify right side
   12,667.62x = 155,616,970.31
5. Step 5: Solve for x
   x = 155,616,970.31/12,667.62
6. Step 6: Final answer
   x = 12,284.63