Finding the Fourth Proportional to 3,726.50, 5,142.57 and 2,070.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.50 : 5,142.57 = 2,070.50 : x
2. Step 2: Convert to fraction form
   3,726.50/5,142.57 = 2,070.50/x
3. Step 3: Cross multiply
   3,726.50x = 5,142.57 × 2,070.50
4. Step 4: Simplify right side
   3,726.50x = 10,647,691.19
5. Step 5: Solve for x
   x = 10,647,691.19/3,726.50
6. Step 6: Final answer
   x = 2,857.29