Finding the Fourth Proportional to 1,401.21, 2,087.46 and 1,317.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.21 : 2,087.46 = 1,317.51 : x
2. Step 2: Convert to fraction form
   1,401.21/2,087.46 = 1,317.51/x
3. Step 3: Cross multiply
   1,401.21x = 2,087.46 × 1,317.51
4. Step 4: Simplify right side
   1,401.21x = 2,750,249.42
5. Step 5: Solve for x
   x = 2,750,249.42/1,401.21
6. Step 6: Final answer
   x = 1,962.77