Finding the Fourth Proportional to 3,128.88, 4,318.56 and 1,802.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.88 : 4,318.56 = 1,802.82 : x
2. Step 2: Convert to fraction form
   3,128.88/4,318.56 = 1,802.82/x
3. Step 3: Cross multiply
   3,128.88x = 4,318.56 × 1,802.82
4. Step 4: Simplify right side
   3,128.88x = 7,785,586.34
5. Step 5: Solve for x
   x = 7,785,586.34/3,128.88
6. Step 6: Final answer
   x = 2,488.30