Finding the Third Proportional to 1,987.31 and 4,248.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.31 : 4,248.56 = 4,248.56 : x
2. Step 2: Convert to fraction form
   1,987.31/4,248.56 = 4,248.56/x
3. Step 3: Cross multiply
   1,987.31x = 4,248.56 × 4,248.56
4. Step 4: Simplify right side
   1,987.31x = 18,050,283.32
5. Step 5: Solve for x
   x = 18,050,283.32/1,987.31
6. Step 6: Final answer
   x = 9,082.76