Finding the Fourth Proportional to 3,870.45, 5,807.70 and 1,681.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.45 : 5,807.70 = 1,681.02 : x
2. Step 2: Convert to fraction form
   3,870.45/5,807.70 = 1,681.02/x
3. Step 3: Cross multiply
   3,870.45x = 5,807.70 × 1,681.02
4. Step 4: Simplify right side
   3,870.45x = 9,762,859.85
5. Step 5: Solve for x
   x = 9,762,859.85/3,870.45
6. Step 6: Final answer
   x = 2,522.41