Finding the Fourth Proportional to 4,128.18, 5,698.89 and 3,125.58

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.18 : 5,698.89 = 3,125.58 : x
2. Step 2: Convert to fraction form
   4,128.18/5,698.89 = 3,125.58/x
3. Step 3: Cross multiply
   4,128.18x = 5,698.89 × 3,125.58
4. Step 4: Simplify right side
   4,128.18x = 17,812,336.61
5. Step 5: Solve for x
   x = 17,812,336.61/4,128.18
6. Step 6: Final answer
   x = 4,314.82