Finding the Fourth Proportional to 2,861.04, 4,291.72 and 913.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.04 : 4,291.72 = 913.09 : x
2. Step 2: Convert to fraction form
   2,861.04/4,291.72 = 913.09/x
3. Step 3: Cross multiply
   2,861.04x = 4,291.72 × 913.09
4. Step 4: Simplify right side
   2,861.04x = 3,918,726.61
5. Step 5: Solve for x
   x = 3,918,726.61/2,861.04
6. Step 6: Final answer
   x = 1,369.69