Finding the Fourth Proportional to 9,561.57, 14,337.69 and 2,987.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,561.57 : 14,337.69 = 2,987.74 : x
2. Step 2: Convert to fraction form
   9,561.57/14,337.69 = 2,987.74/x
3. Step 3: Cross multiply
   9,561.57x = 14,337.69 × 2,987.74
4. Step 4: Simplify right side
   9,561.57x = 42,837,289.92
5. Step 5: Solve for x
   x = 42,837,289.92/9,561.57
6. Step 6: Final answer
   x = 4,480.15