Finding the Third Proportional to 42,918 and 56,569

Step by Step Solution

1. Step 1: Write the proportion equation
   42,918 : 56,569 = 56,569 : x
2. Step 2: Convert to fraction form
   42,918/56,569 = 56,569/x
3. Step 3: Cross multiply
   42,918x = 56,569 × 56,569
4. Step 4: Simplify right side
   42,918x = 3,200,051,761
5. Step 5: Solve for x
   x = 3,200,051,761/42,918
6. Step 6: Final answer
   x = 74,562.00