Finding the Fourth Proportional to 5,406.89, 7,450.43 and 3,988.33

Step by Step Solution

1. Step 1: Write the proportion equation
   5,406.89 : 7,450.43 = 3,988.33 : x
2. Step 2: Convert to fraction form
   5,406.89/7,450.43 = 3,988.33/x
3. Step 3: Cross multiply
   5,406.89x = 7,450.43 × 3,988.33
4. Step 4: Simplify right side
   5,406.89x = 29,714,736.23
5. Step 5: Solve for x
   x = 29,714,736.23/5,406.89
6. Step 6: Final answer
   x = 5,495.72