Finding the Fourth Proportional to 1,105.72, 1,528.33 and 971.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.72 : 1,528.33 = 971.94 : x
2. Step 2: Convert to fraction form
   1,105.72/1,528.33 = 971.94/x
3. Step 3: Cross multiply
   1,105.72x = 1,528.33 × 971.94
4. Step 4: Simplify right side
   1,105.72x = 1,485,445.06
5. Step 5: Solve for x
   x = 1,485,445.06/1,105.72
6. Step 6: Final answer
   x = 1,343.42