Finding the Third Proportional to 28,617.75 and 43,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,617.75 : 43,780.50 = 43,780.50 : x
2. Step 2: Convert to fraction form
   28,617.75/43,780.50 = 43,780.50/x
3. Step 3: Cross multiply
   28,617.75x = 43,780.50 × 43,780.50
4. Step 4: Simplify right side
   28,617.75x = 1,916,732,180.25
5. Step 5: Solve for x
   x = 1,916,732,180.25/28,617.75
6. Step 6: Final answer
   x = 66,977.04