Finding the Third Proportional to 42,256.69 and 56,917.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,256.69 : 56,917.69 = 56,917.69 : x
2. Step 2: Convert to fraction form
   42,256.69/56,917.69 = 56,917.69/x
3. Step 3: Cross multiply
   42,256.69x = 56,917.69 × 56,917.69
4. Step 4: Simplify right side
   42,256.69x = 3,239,623,150.35
5. Step 5: Solve for x
   x = 3,239,623,150.35/42,256.69
6. Step 6: Final answer
   x = 76,665.34