Finding the Fourth Proportional to 1,760.72, 2,426.99 and 1,288.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.72 : 2,426.99 = 1,288.64 : x
2. Step 2: Convert to fraction form
   1,760.72/2,426.99 = 1,288.64/x
3. Step 3: Cross multiply
   1,760.72x = 2,426.99 × 1,288.64
4. Step 4: Simplify right side
   1,760.72x = 3,127,516.02
5. Step 5: Solve for x
   x = 3,127,516.02/1,760.72
6. Step 6: Final answer
   x = 1,776.28