Finding the Fourth Proportional to 1,339.25, 1,836.39 and 1,292.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.25 : 1,836.39 = 1,292.90 : x
2. Step 2: Convert to fraction form
   1,339.25/1,836.39 = 1,292.90/x
3. Step 3: Cross multiply
   1,339.25x = 1,836.39 × 1,292.90
4. Step 4: Simplify right side
   1,339.25x = 2,374,264.30
5. Step 5: Solve for x
   x = 2,374,264.30/1,339.25
6. Step 6: Final answer
   x = 1,772.84