Finding the Third Proportional to 42,809 and 56,803

Step by Step Solution

1. Step 1: Write the proportion equation
   42,809 : 56,803 = 56,803 : x
2. Step 2: Convert to fraction form
   42,809/56,803 = 56,803/x
3. Step 3: Cross multiply
   42,809x = 56,803 × 56,803
4. Step 4: Simplify right side
   42,809x = 3,226,580,809
5. Step 5: Solve for x
   x = 3,226,580,809/42,809
6. Step 6: Final answer
   x = 75,371.55