Finding the Fourth Proportional to 3,726.60, 5,142.60 and 2,111.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.60 : 5,142.60 = 2,111.36 : x
2. Step 2: Convert to fraction form
   3,726.60/5,142.60 = 2,111.36/x
3. Step 3: Cross multiply
   3,726.60x = 5,142.60 × 2,111.36
4. Step 4: Simplify right side
   3,726.60x = 10,857,843.67
5. Step 5: Solve for x
   x = 10,857,843.67/3,726.60
6. Step 6: Final answer
   x = 2,913.61