Finding the Fourth Proportional to 1,547.31, 2,321.27 and 681.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,547.31 : 2,321.27 = 681.63 : x
2. Step 2: Convert to fraction form
   1,547.31/2,321.27 = 681.63/x
3. Step 3: Cross multiply
   1,547.31x = 2,321.27 × 681.63
4. Step 4: Simplify right side
   1,547.31x = 1,582,247.27
5. Step 5: Solve for x
   x = 1,582,247.27/1,547.31
6. Step 6: Final answer
   x = 1,022.58