Finding the Fourth Proportional to 1,259.84, 1,889.82 and 826.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.84 : 1,889.82 = 826.10 : x
2. Step 2: Convert to fraction form
   1,259.84/1,889.82 = 826.10/x
3. Step 3: Cross multiply
   1,259.84x = 1,889.82 × 826.10
4. Step 4: Simplify right side
   1,259.84x = 1,561,180.30
5. Step 5: Solve for x
   x = 1,561,180.30/1,259.84
6. Step 6: Final answer
   x = 1,239.19