Finding the Fourth Proportional to 2,346.90, 3,238.71 and 1,284.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,346.90 : 3,238.71 = 1,284.69 : x
2. Step 2: Convert to fraction form
   2,346.90/3,238.71 = 1,284.69/x
3. Step 3: Cross multiply
   2,346.90x = 3,238.71 × 1,284.69
4. Step 4: Simplify right side
   2,346.90x = 4,160,738.35
5. Step 5: Solve for x
   x = 4,160,738.35/2,346.90
6. Step 6: Final answer
   x = 1,772.87