Finding the Fourth Proportional to 1,043.29, 1,447.12 and 1,005.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.29 : 1,447.12 = 1,005.91 : x
2. Step 2: Convert to fraction form
   1,043.29/1,447.12 = 1,005.91/x
3. Step 3: Cross multiply
   1,043.29x = 1,447.12 × 1,005.91
4. Step 4: Simplify right side
   1,043.29x = 1,455,672.48
5. Step 5: Solve for x
   x = 1,455,672.48/1,043.29
6. Step 6: Final answer
   x = 1,395.27