Finding the Fourth Proportional to 2,103.52, 2,902.72 and 1,172

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.52 : 2,902.72 = 1,172 : x
2. Step 2: Convert to fraction form
   2,103.52/2,902.72 = 1,172/x
3. Step 3: Cross multiply
   2,103.52x = 2,902.72 × 1,172
4. Step 4: Simplify right side
   2,103.52x = 3,401,987.84
5. Step 5: Solve for x
   x = 3,401,987.84/2,103.52
6. Step 6: Final answer
   x = 1,617.28