Finding the Fourth Proportional to 1,105.73, 1,527.05 and 1,012.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.73 : 1,527.05 = 1,012.13 : x
2. Step 2: Convert to fraction form
   1,105.73/1,527.05 = 1,012.13/x
3. Step 3: Cross multiply
   1,105.73x = 1,527.05 × 1,012.13
4. Step 4: Simplify right side
   1,105.73x = 1,545,573.12
5. Step 5: Solve for x
   x = 1,545,573.12/1,105.73
6. Step 6: Final answer
   x = 1,397.79