Finding the Fourth Proportional to 3,510.15, 5,264.58 and 1,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.15 : 5,264.58 = 1,288.50 : x
2. Step 2: Convert to fraction form
   3,510.15/5,264.58 = 1,288.50/x
3. Step 3: Cross multiply
   3,510.15x = 5,264.58 × 1,288.50
4. Step 4: Simplify right side
   3,510.15x = 6,783,411.33
5. Step 5: Solve for x
   x = 6,783,411.33/3,510.15
6. Step 6: Final answer
   x = 1,932.51