Finding the Fourth Proportional to 3,391.17, 5,086.89 and 1,051.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.17 : 5,086.89 = 1,051.42 : x
2. Step 2: Convert to fraction form
   3,391.17/5,086.89 = 1,051.42/x
3. Step 3: Cross multiply
   3,391.17x = 5,086.89 × 1,051.42
4. Step 4: Simplify right side
   3,391.17x = 5,348,457.88
5. Step 5: Solve for x
   x = 5,348,457.88/3,391.17
6. Step 6: Final answer
   x = 1,577.17