Finding the Fourth Proportional to 2,283.31, 3,151.02 and 1,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.31 : 3,151.02 = 1,288.50 : x
2. Step 2: Convert to fraction form
   2,283.31/3,151.02 = 1,288.50/x
3. Step 3: Cross multiply
   2,283.31x = 3,151.02 × 1,288.50
4. Step 4: Simplify right side
   2,283.31x = 4,060,089.27
5. Step 5: Solve for x
   x = 4,060,089.27/2,283.31
6. Step 6: Final answer
   x = 1,778.16