Finding the Third Proportional to 28,139 and 61,507

Step by Step Solution

1. Step 1: Write the proportion equation
   28,139 : 61,507 = 61,507 : x
2. Step 2: Convert to fraction form
   28,139/61,507 = 61,507/x
3. Step 3: Cross multiply
   28,139x = 61,507 × 61,507
4. Step 4: Simplify right side
   28,139x = 3,783,111,049
5. Step 5: Solve for x
   x = 3,783,111,049/28,139
6. Step 6: Final answer
   x = 134,443.69