Finding the Fourth Proportional to 3,120.32, 4,680.18 and 1,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,120.32 : 4,680.18 = 1,271.50 : x
2. Step 2: Convert to fraction form
   3,120.32/4,680.18 = 1,271.50/x
3. Step 3: Cross multiply
   3,120.32x = 4,680.18 × 1,271.50
4. Step 4: Simplify right side
   3,120.32x = 5,950,837.17
5. Step 5: Solve for x
   x = 5,950,837.17/3,120.32
6. Step 6: Final answer
   x = 1,907.12