Finding the Fourth Proportional to 9,725.59, 14,590.69 and 3,151.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,725.59 : 14,590.69 = 3,151.78 : x
2. Step 2: Convert to fraction form
   9,725.59/14,590.69 = 3,151.78/x
3. Step 3: Cross multiply
   9,725.59x = 14,590.69 × 3,151.78
4. Step 4: Simplify right side
   9,725.59x = 45,986,612.39
5. Step 5: Solve for x
   x = 45,986,612.39/9,725.59
6. Step 6: Final answer
   x = 4,728.41