Finding the Fourth Proportional to 3,388.57, 5,081.52 and 1,307.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.57 : 5,081.52 = 1,307.43 : x
2. Step 2: Convert to fraction form
   3,388.57/5,081.52 = 1,307.43/x
3. Step 3: Cross multiply
   3,388.57x = 5,081.52 × 1,307.43
4. Step 4: Simplify right side
   3,388.57x = 6,643,731.69
5. Step 5: Solve for x
   x = 6,643,731.69/3,388.57
6. Step 6: Final answer
   x = 1,960.63