Finding the Fourth Proportional to 1,111.14, 1,531.69 and 914.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.14 : 1,531.69 = 914.31 : x
2. Step 2: Convert to fraction form
   1,111.14/1,531.69 = 914.31/x
3. Step 3: Cross multiply
   1,111.14x = 1,531.69 × 914.31
4. Step 4: Simplify right side
   1,111.14x = 1,400,439.48
5. Step 5: Solve for x
   x = 1,400,439.48/1,111.14
6. Step 6: Final answer
   x = 1,260.36