Finding the Third Proportional to 42,807 and 56,800

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807 : 56,800 = 56,800 : x
2. Step 2: Convert to fraction form
   42,807/56,800 = 56,800/x
3. Step 3: Cross multiply
   42,807x = 56,800 × 56,800
4. Step 4: Simplify right side
   42,807x = 3,226,240,000
5. Step 5: Solve for x
   x = 3,226,240,000/42,807
6. Step 6: Final answer
   x = 75,367.11