Finding the Fourth Proportional to 3,911.39, 5,863.43 and 1,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,911.39 : 5,863.43 = 1,312.50 : x
2. Step 2: Convert to fraction form
   3,911.39/5,863.43 = 1,312.50/x
3. Step 3: Cross multiply
   3,911.39x = 5,863.43 × 1,312.50
4. Step 4: Simplify right side
   3,911.39x = 7,695,745.31
5. Step 5: Solve for x
   x = 7,695,745.31/3,911.39
6. Step 6: Final answer
   x = 1,967.52