Finding the Third Proportional to 783.56 and 1,672.31

Step by Step Solution

1. Step 1: Write the proportion equation
   783.56 : 1,672.31 = 1,672.31 : x
2. Step 2: Convert to fraction form
   783.56/1,672.31 = 1,672.31/x
3. Step 3: Cross multiply
   783.56x = 1,672.31 × 1,672.31
4. Step 4: Simplify right side
   783.56x = 2,796,629.10
5. Step 5: Solve for x
   x = 2,796,629.10/783.56
6. Step 6: Final answer
   x = 3,569.12