Finding the Fourth Proportional to 2,931.95, 4,398.69 and 1,288.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.95 : 4,398.69 = 1,288.82 : x
2. Step 2: Convert to fraction form
   2,931.95/4,398.69 = 1,288.82/x
3. Step 3: Cross multiply
   2,931.95x = 4,398.69 × 1,288.82
4. Step 4: Simplify right side
   2,931.95x = 5,669,119.65
5. Step 5: Solve for x
   x = 5,669,119.65/2,931.95
6. Step 6: Final answer
   x = 1,933.57