Finding the Fourth Proportional to 3,894.99, 5,828.50 and 3,634.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894.99 : 5,828.50 = 3,634.30 : x
2. Step 2: Convert to fraction form
   3,894.99/5,828.50 = 3,634.30/x
3. Step 3: Cross multiply
   3,894.99x = 5,828.50 × 3,634.30
4. Step 4: Simplify right side
   3,894.99x = 21,182,517.55
5. Step 5: Solve for x
   x = 21,182,517.55/3,894.99
6. Step 6: Final answer
   x = 5,438.40