Finding the Fourth Proportional to 2,580.31, 3,869.98 and 730.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.31 : 3,869.98 = 730.98 : x
2. Step 2: Convert to fraction form
   2,580.31/3,869.98 = 730.98/x
3. Step 3: Cross multiply
   2,580.31x = 3,869.98 × 730.98
4. Step 4: Simplify right side
   2,580.31x = 2,828,877.98
5. Step 5: Solve for x
   x = 2,828,877.98/2,580.31
6. Step 6: Final answer
   x = 1,096.33