Finding the Third Proportional to 31,488 and 42,576

Step by Step Solution

1. Step 1: Write the proportion equation
   31,488 : 42,576 = 42,576 : x
2. Step 2: Convert to fraction form
   31,488/42,576 = 42,576/x
3. Step 3: Cross multiply
   31,488x = 42,576 × 42,576
4. Step 4: Simplify right side
   31,488x = 1,812,715,776
5. Step 5: Solve for x
   x = 1,812,715,776/31,488
6. Step 6: Final answer
   x = 57,568.46