Finding the Third Proportional to 1,359.28 and 1,699.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.28 : 1,699.31 = 1,699.31 : x
2. Step 2: Convert to fraction form
   1,359.28/1,699.31 = 1,699.31/x
3. Step 3: Cross multiply
   1,359.28x = 1,699.31 × 1,699.31
4. Step 4: Simplify right side
   1,359.28x = 2,887,662.97
5. Step 5: Solve for x
   x = 2,887,662.97/1,359.28
6. Step 6: Final answer
   x = 2,124.40