Finding the Fourth Proportional to 2,088.78, 3,130.94 and 1,047.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.78 : 3,130.94 = 1,047.12 : x
2. Step 2: Convert to fraction form
   2,088.78/3,130.94 = 1,047.12/x
3. Step 3: Cross multiply
   2,088.78x = 3,130.94 × 1,047.12
4. Step 4: Simplify right side
   2,088.78x = 3,278,464.66
5. Step 5: Solve for x
   x = 3,278,464.66/2,088.78
6. Step 6: Final answer
   x = 1,569.56