Finding the Fourth Proportional to 2,560.61, 3,841.25 and 917.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.61 : 3,841.25 = 917.34 : x
2. Step 2: Convert to fraction form
   2,560.61/3,841.25 = 917.34/x
3. Step 3: Cross multiply
   2,560.61x = 3,841.25 × 917.34
4. Step 4: Simplify right side
   2,560.61x = 3,523,727.69
5. Step 5: Solve for x
   x = 3,523,727.69/2,560.61
6. Step 6: Final answer
   x = 1,376.13