Finding the Third Proportional to 42,072 and 63,216

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072 : 63,216 = 63,216 : x
2. Step 2: Convert to fraction form
   42,072/63,216 = 63,216/x
3. Step 3: Cross multiply
   42,072x = 63,216 × 63,216
4. Step 4: Simplify right side
   42,072x = 3,996,262,656
5. Step 5: Solve for x
   x = 3,996,262,656/42,072
6. Step 6: Final answer
   x = 94,986.28