Finding the Fourth Proportional to 3,989.90, 5,983.59 and 3,693.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.90 : 5,983.59 = 3,693.44 : x
2. Step 2: Convert to fraction form
   3,989.90/5,983.59 = 3,693.44/x
3. Step 3: Cross multiply
   3,989.90x = 5,983.59 × 3,693.44
4. Step 4: Simplify right side
   3,989.90x = 22,100,030.65
5. Step 5: Solve for x
   x = 22,100,030.65/3,989.90
6. Step 6: Final answer
   x = 5,538.99