Finding the Fourth Proportional to 1,485.59, 2,229.46 and 716.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.59 : 2,229.46 = 716.63 : x
2. Step 2: Convert to fraction form
   1,485.59/2,229.46 = 716.63/x
3. Step 3: Cross multiply
   1,485.59x = 2,229.46 × 716.63
4. Step 4: Simplify right side
   1,485.59x = 1,597,684.98
5. Step 5: Solve for x
   x = 1,597,684.98/1,485.59
6. Step 6: Final answer
   x = 1,075.46