Finding the Third Proportional to 42,286 and 55,617

Step by Step Solution

1. Step 1: Write the proportion equation
   42,286 : 55,617 = 55,617 : x
2. Step 2: Convert to fraction form
   42,286/55,617 = 55,617/x
3. Step 3: Cross multiply
   42,286x = 55,617 × 55,617
4. Step 4: Simplify right side
   42,286x = 3,093,250,689
5. Step 5: Solve for x
   x = 3,093,250,689/42,286
6. Step 6: Final answer
   x = 73,150.70