Finding the Fourth Proportional to 1,354.68, 1,869.12 and 1,105.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.68 : 1,869.12 = 1,105.61 : x
2. Step 2: Convert to fraction form
   1,354.68/1,869.12 = 1,105.61/x
3. Step 3: Cross multiply
   1,354.68x = 1,869.12 × 1,105.61
4. Step 4: Simplify right side
   1,354.68x = 2,066,508.42
5. Step 5: Solve for x
   x = 2,066,508.42/1,354.68
6. Step 6: Final answer
   x = 1,525.46