Finding the Third Proportional to 2,160.42 and 4,628.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.42 : 4,628.39 = 4,628.39 : x
2. Step 2: Convert to fraction form
   2,160.42/4,628.39 = 4,628.39/x
3. Step 3: Cross multiply
   2,160.42x = 4,628.39 × 4,628.39
4. Step 4: Simplify right side
   2,160.42x = 21,421,999.78
5. Step 5: Solve for x
   x = 21,421,999.78/2,160.42
6. Step 6: Final answer
   x = 9,915.66