Finding the Fourth Proportional to 3,448.69, 5,174.05 and 1,988.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,448.69 : 5,174.05 = 1,988.89 : x
2. Step 2: Convert to fraction form
   3,448.69/5,174.05 = 1,988.89/x
3. Step 3: Cross multiply
   3,448.69x = 5,174.05 × 1,988.89
4. Step 4: Simplify right side
   3,448.69x = 10,290,605.86
5. Step 5: Solve for x
   x = 10,290,605.86/3,448.69
6. Step 6: Final answer
   x = 2,983.92