Finding the Third Proportional to 56,210 and 89,499

Step by Step Solution

1. Step 1: Write the proportion equation
   56,210 : 89,499 = 89,499 : x
2. Step 2: Convert to fraction form
   56,210/89,499 = 89,499/x
3. Step 3: Cross multiply
   56,210x = 89,499 × 89,499
4. Step 4: Simplify right side
   56,210x = 8,010,071,001
5. Step 5: Solve for x
   x = 8,010,071,001/56,210
6. Step 6: Final answer
   x = 142,502.60