Finding the Fourth Proportional to 3,469.22, 5,200.02 and 1,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,469.22 : 5,200.02 = 1,388.72 : x
2. Step 2: Convert to fraction form
   3,469.22/5,200.02 = 1,388.72/x
3. Step 3: Cross multiply
   3,469.22x = 5,200.02 × 1,388.72
4. Step 4: Simplify right side
   3,469.22x = 7,221,371.77
5. Step 5: Solve for x
   x = 7,221,371.77/3,469.22
6. Step 6: Final answer
   x = 2,081.55