Finding the Third Proportional to 89,393 and 123,139

Step by Step Solution

1. Step 1: Write the proportion equation
   89,393 : 123,139 = 123,139 : x
2. Step 2: Convert to fraction form
   89,393/123,139 = 123,139/x
3. Step 3: Cross multiply
   89,393x = 123,139 × 123,139
4. Step 4: Simplify right side
   89,393x = 15,163,213,321
5. Step 5: Solve for x
   x = 15,163,213,321/89,393
6. Step 6: Final answer
   x = 169,624.17