Finding the Fourth Proportional to 2,101.16, 3,150.48 and 1,127.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.16 : 3,150.48 = 1,127.72 : x
2. Step 2: Convert to fraction form
   2,101.16/3,150.48 = 1,127.72/x
3. Step 3: Cross multiply
   2,101.16x = 3,150.48 × 1,127.72
4. Step 4: Simplify right side
   2,101.16x = 3,552,859.31
5. Step 5: Solve for x
   x = 3,552,859.31/2,101.16
6. Step 6: Final answer
   x = 1,690.90