Finding the Fourth Proportional to 2,390.47, 3,585.61 and 659.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.47 : 3,585.61 = 659.05 : x
2. Step 2: Convert to fraction form
   2,390.47/3,585.61 = 659.05/x
3. Step 3: Cross multiply
   2,390.47x = 3,585.61 × 659.05
4. Step 4: Simplify right side
   2,390.47x = 2,363,075.05
5. Step 5: Solve for x
   x = 2,363,075.05/2,390.47
6. Step 6: Final answer
   x = 988.54