Finding the Third Proportional to 31,554 and 42,318

Step by Step Solution

1. Step 1: Write the proportion equation
   31,554 : 42,318 = 42,318 : x
2. Step 2: Convert to fraction form
   31,554/42,318 = 42,318/x
3. Step 3: Cross multiply
   31,554x = 42,318 × 42,318
4. Step 4: Simplify right side
   31,554x = 1,790,813,124
5. Step 5: Solve for x
   x = 1,790,813,124/31,554
6. Step 6: Final answer
   x = 56,753.92