Finding the Third Proportional to 4,920.19 and 10,618.31

Step by Step Solution

1. Step 1: Write the proportion equation
   4,920.19 : 10,618.31 = 10,618.31 : x
2. Step 2: Convert to fraction form
   4,920.19/10,618.31 = 10,618.31/x
3. Step 3: Cross multiply
   4,920.19x = 10,618.31 × 10,618.31
4. Step 4: Simplify right side
   4,920.19x = 112,748,560.35
5. Step 5: Solve for x
   x = 112,748,560.35/4,920.19
6. Step 6: Final answer
   x = 22,915.50