Finding the Fourth Proportional to 3,728.96, 5,145.86 and 2,135.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.96 : 5,145.86 = 2,135.56 : x
2. Step 2: Convert to fraction form
   3,728.96/5,145.86 = 2,135.56/x
3. Step 3: Cross multiply
   3,728.96x = 5,145.86 × 2,135.56
4. Step 4: Simplify right side
   3,728.96x = 10,989,256.37
5. Step 5: Solve for x
   x = 10,989,256.37/3,728.96
6. Step 6: Final answer
   x = 2,947.00