Finding the Fourth Proportional to 1,227.86, 1,694.69 and 807.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.86 : 1,694.69 = 807.47 : x
2. Step 2: Convert to fraction form
   1,227.86/1,694.69 = 807.47/x
3. Step 3: Cross multiply
   1,227.86x = 1,694.69 × 807.47
4. Step 4: Simplify right side
   1,227.86x = 1,368,398.82
5. Step 5: Solve for x
   x = 1,368,398.82/1,227.86
6. Step 6: Final answer
   x = 1,114.46