Finding the Fourth Proportional to 1,909.98, 2,865.25 and 724.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.98 : 2,865.25 = 724.46 : x
2. Step 2: Convert to fraction form
   1,909.98/2,865.25 = 724.46/x
3. Step 3: Cross multiply
   1,909.98x = 2,865.25 × 724.46
4. Step 4: Simplify right side
   1,909.98x = 2,075,748.23
5. Step 5: Solve for x
   x = 2,075,748.23/1,909.98
6. Step 6: Final answer
   x = 1,086.79