Finding the Fourth Proportional to 2,580.94, 3,870.91 and 731.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.94 : 3,870.91 = 731.61 : x
2. Step 2: Convert to fraction form
   2,580.94/3,870.91 = 731.61/x
3. Step 3: Cross multiply
   2,580.94x = 3,870.91 × 731.61
4. Step 4: Simplify right side
   2,580.94x = 2,831,996.47
5. Step 5: Solve for x
   x = 2,831,996.47/2,580.94
6. Step 6: Final answer
   x = 1,097.27