Finding the Third Proportional to 42,780.38 and 56,774.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,780.38 : 56,774.25 = 56,774.25 : x
2. Step 2: Convert to fraction form
   42,780.38/56,774.25 = 56,774.25/x
3. Step 3: Cross multiply
   42,780.38x = 56,774.25 × 56,774.25
4. Step 4: Simplify right side
   42,780.38x = 3,223,315,463.06
5. Step 5: Solve for x
   x = 3,223,315,463.06/42,780.38
6. Step 6: Final answer
   x = 75,345.66