Finding the Third Proportional to 56,391 and 122,499

Step by Step Solution

1. Step 1: Write the proportion equation
   56,391 : 122,499 = 122,499 : x
2. Step 2: Convert to fraction form
   56,391/122,499 = 122,499/x
3. Step 3: Cross multiply
   56,391x = 122,499 × 122,499
4. Step 4: Simplify right side
   56,391x = 15,006,005,001
5. Step 5: Solve for x
   x = 15,006,005,001/56,391
6. Step 6: Final answer
   x = 266,106.38