Finding the Third Proportional to 42,808 and 56,817

Step by Step Solution

1. Step 1: Write the proportion equation
   42,808 : 56,817 = 56,817 : x
2. Step 2: Convert to fraction form
   42,808/56,817 = 56,817/x
3. Step 3: Cross multiply
   42,808x = 56,817 × 56,817
4. Step 4: Simplify right side
   42,808x = 3,228,171,489
5. Step 5: Solve for x
   x = 3,228,171,489/42,808
6. Step 6: Final answer
   x = 75,410.47