Finding the Fourth Proportional to 3,870.52, 5,803.98 and 1,405.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.52 : 5,803.98 = 1,405.24 : x
2. Step 2: Convert to fraction form
   3,870.52/5,803.98 = 1,405.24/x
3. Step 3: Cross multiply
   3,870.52x = 5,803.98 × 1,405.24
4. Step 4: Simplify right side
   3,870.52x = 8,155,984.86
5. Step 5: Solve for x
   x = 8,155,984.86/3,870.52
6. Step 6: Final answer
   x = 2,107.21