Finding the Fourth Proportional to 1,921.78, 2,650.29 and 1,259.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.78 : 2,650.29 = 1,259.00 : x
2. Step 2: Convert to fraction form
   1,921.78/2,650.29 = 1,259.00/x
3. Step 3: Cross multiply
   1,921.78x = 2,650.29 × 1,259.00
4. Step 4: Simplify right side
   1,921.78x = 3,336,704.40
5. Step 5: Solve for x
   x = 3,336,704.40/1,921.78
6. Step 6: Final answer
   x = 1,736.26