Finding the Third Proportional to 31,224 and 42,216

Step by Step Solution

1. Step 1: Write the proportion equation
   31,224 : 42,216 = 42,216 : x
2. Step 2: Convert to fraction form
   31,224/42,216 = 42,216/x
3. Step 3: Cross multiply
   31,224x = 42,216 × 42,216
4. Step 4: Simplify right side
   31,224x = 1,782,190,656
5. Step 5: Solve for x
   x = 1,782,190,656/31,224
6. Step 6: Final answer
   x = 57,077.59