Finding the Third Proportional to 31,515 and 42,051

Step by Step Solution

1. Step 1: Write the proportion equation
   31,515 : 42,051 = 42,051 : x
2. Step 2: Convert to fraction form
   31,515/42,051 = 42,051/x
3. Step 3: Cross multiply
   31,515x = 42,051 × 42,051
4. Step 4: Simplify right side
   31,515x = 1,768,286,601
5. Step 5: Solve for x
   x = 1,768,286,601/31,515
6. Step 6: Final answer
   x = 56,109.36