Finding the Fourth Proportional to 9,703.64, 14,557.31 and 3,128.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,703.64 : 14,557.31 = 3,128.06 : x
2. Step 2: Convert to fraction form
   9,703.64/14,557.31 = 3,128.06/x
3. Step 3: Cross multiply
   9,703.64x = 14,557.31 × 3,128.06
4. Step 4: Simplify right side
   9,703.64x = 45,536,050.69
5. Step 5: Solve for x
   x = 45,536,050.69/9,703.64
6. Step 6: Final answer
   x = 4,692.68