Finding the Fourth Proportional to 6,861.31, 10,291.91 and 1,667.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,861.31 : 10,291.91 = 1,667.18 : x
2. Step 2: Convert to fraction form
   6,861.31/10,291.91 = 1,667.18/x
3. Step 3: Cross multiply
   6,861.31x = 10,291.91 × 1,667.18
4. Step 4: Simplify right side
   6,861.31x = 17,158,493.29
5. Step 5: Solve for x
   x = 17,158,493.29/6,861.31
6. Step 6: Final answer
   x = 2,500.76