Finding the Fourth Proportional to 1,275.60, 1,759.89 and 716.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.60 : 1,759.89 = 716.00 : x
2. Step 2: Convert to fraction form
   1,275.60/1,759.89 = 716.00/x
3. Step 3: Cross multiply
   1,275.60x = 1,759.89 × 716.00
4. Step 4: Simplify right side
   1,275.60x = 1,260,075.13
5. Step 5: Solve for x
   x = 1,260,075.13/1,275.60
6. Step 6: Final answer
   x = 987.83