Finding the Third Proportional to 36,124 and 53,139

Step by Step Solution

1. Step 1: Write the proportion equation
   36,124 : 53,139 = 53,139 : x
2. Step 2: Convert to fraction form
   36,124/53,139 = 53,139/x
3. Step 3: Cross multiply
   36,124x = 53,139 × 53,139
4. Step 4: Simplify right side
   36,124x = 2,823,753,321
5. Step 5: Solve for x
   x = 2,823,753,321/36,124
6. Step 6: Final answer
   x = 78,168.35