Finding the Fourth Proportional to 2,103.22, 3,156.27 and 1,129.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.22 : 3,156.27 = 1,129.62 : x
2. Step 2: Convert to fraction form
   2,103.22/3,156.27 = 1,129.62/x
3. Step 3: Cross multiply
   2,103.22x = 3,156.27 × 1,129.62
4. Step 4: Simplify right side
   2,103.22x = 3,565,385.72
5. Step 5: Solve for x
   x = 3,565,385.72/2,103.22
6. Step 6: Final answer
   x = 1,695.20