Finding the Fourth Proportional to 10,459, 15,689.40 and 2,667.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,459 : 15,689.40 = 2,667.79 : x
2. Step 2: Convert to fraction form
   10,459/15,689.40 = 2,667.79/x
3. Step 3: Cross multiply
   10,459x = 15,689.40 × 2,667.79
4. Step 4: Simplify right side
   10,459x = 41,856,024.43
5. Step 5: Solve for x
   x = 41,856,024.43/10,459
6. Step 6: Final answer
   x = 4,001.91