Finding the Third Proportional to 28,815 and 42,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,815 : 42,196.50 = 42,196.50 : x
2. Step 2: Convert to fraction form
   28,815/42,196.50 = 42,196.50/x
3. Step 3: Cross multiply
   28,815x = 42,196.50 × 42,196.50
4. Step 4: Simplify right side
   28,815x = 1,780,544,612.25
5. Step 5: Solve for x
   x = 1,780,544,612.25/28,815
6. Step 6: Final answer
   x = 61,792.28