Finding the Fourth Proportional to 3,985.60, 5,501.62 and 3,423.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.60 : 5,501.62 = 3,423.82 : x
2. Step 2: Convert to fraction form
   3,985.60/5,501.62 = 3,423.82/x
3. Step 3: Cross multiply
   3,985.60x = 5,501.62 × 3,423.82
4. Step 4: Simplify right side
   3,985.60x = 18,836,556.59
5. Step 5: Solve for x
   x = 18,836,556.59/3,985.60
6. Step 6: Final answer
   x = 4,726.15