Finding the Fourth Proportional to 1,759.98, 2,638.89 and 1,298.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,759.98 : 2,638.89 = 1,298.88 : x
2. Step 2: Convert to fraction form
   1,759.98/2,638.89 = 1,298.88/x
3. Step 3: Cross multiply
   1,759.98x = 2,638.89 × 1,298.88
4. Step 4: Simplify right side
   1,759.98x = 3,427,601.44
5. Step 5: Solve for x
   x = 3,427,601.44/1,759.98
6. Step 6: Final answer
   x = 1,947.52