Finding the Fourth Proportional to 1,293.72, 1,784.31 and 914.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.72 : 1,784.31 = 914.94 : x
2. Step 2: Convert to fraction form
   1,293.72/1,784.31 = 914.94/x
3. Step 3: Cross multiply
   1,293.72x = 1,784.31 × 914.94
4. Step 4: Simplify right side
   1,293.72x = 1,632,536.59
5. Step 5: Solve for x
   x = 1,632,536.59/1,293.72
6. Step 6: Final answer
   x = 1,261.89