Finding the Fourth Proportional to 3,391.31, 5,087.59 and 1,051.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.31 : 5,087.59 = 1,051.29 : x
2. Step 2: Convert to fraction form
   3,391.31/5,087.59 = 1,051.29/x
3. Step 3: Cross multiply
   3,391.31x = 5,087.59 × 1,051.29
4. Step 4: Simplify right side
   3,391.31x = 5,348,529.86
5. Step 5: Solve for x
   x = 5,348,529.86/3,391.31
6. Step 6: Final answer
   x = 1,577.13