Finding the Third Proportional to 1,116.28 and 2,420.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.28 : 2,420.51 = 2,420.51 : x
2. Step 2: Convert to fraction form
   1,116.28/2,420.51 = 2,420.51/x
3. Step 3: Cross multiply
   1,116.28x = 2,420.51 × 2,420.51
4. Step 4: Simplify right side
   1,116.28x = 5,858,858.07
5. Step 5: Solve for x
   x = 5,858,858.07/1,116.28
6. Step 6: Final answer
   x = 5,248.55