Finding the Fourth Proportional to 2,103.17, 3,152.45 and 869.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.17 : 3,152.45 = 869.91 : x
2. Step 2: Convert to fraction form
   2,103.17/3,152.45 = 869.91/x
3. Step 3: Cross multiply
   2,103.17x = 3,152.45 × 869.91
4. Step 4: Simplify right side
   2,103.17x = 2,742,347.78
5. Step 5: Solve for x
   x = 2,742,347.78/2,103.17
6. Step 6: Final answer
   x = 1,303.91