Finding the Third Proportional to 899 and 2,111.75

Step by Step Solution

1. Step 1: Write the proportion equation
   899 : 2,111.75 = 2,111.75 : x
2. Step 2: Convert to fraction form
   899/2,111.75 = 2,111.75/x
3. Step 3: Cross multiply
   899x = 2,111.75 × 2,111.75
4. Step 4: Simplify right side
   899x = 4,459,488.06
5. Step 5: Solve for x
   x = 4,459,488.06/899
6. Step 6: Final answer
   x = 4,960.50