Finding the Fourth Proportional to 9,703.62, 14,552.37 and 3,128.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,703.62 : 14,552.37 = 3,128.40 : x
2. Step 2: Convert to fraction form
   9,703.62/14,552.37 = 3,128.40/x
3. Step 3: Cross multiply
   9,703.62x = 14,552.37 × 3,128.40
4. Step 4: Simplify right side
   9,703.62x = 45,525,634.31
5. Step 5: Solve for x
   x = 45,525,634.31/9,703.62
6. Step 6: Final answer
   x = 4,691.61