Finding the Fourth Proportional to 2,111.52, 3,159.32 and 1,264.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.52 : 3,159.32 = 1,264.07 : x
2. Step 2: Convert to fraction form
   2,111.52/3,159.32 = 1,264.07/x
3. Step 3: Cross multiply
   2,111.52x = 3,159.32 × 1,264.07
4. Step 4: Simplify right side
   2,111.52x = 3,993,612.69
5. Step 5: Solve for x
   x = 3,993,612.69/2,111.52
6. Step 6: Final answer
   x = 1,891.34