Finding the Fourth Proportional to 1,735.98, 2,600.72 and 870.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,735.98 : 2,600.72 = 870.90 : x
2. Step 2: Convert to fraction form
   1,735.98/2,600.72 = 870.90/x
3. Step 3: Cross multiply
   1,735.98x = 2,600.72 × 870.90
4. Step 4: Simplify right side
   1,735.98x = 2,264,967.05
5. Step 5: Solve for x
   x = 2,264,967.05/1,735.98
6. Step 6: Final answer
   x = 1,304.72