Finding the Third Proportional to 56,387 and 89,288

Step by Step Solution

1. Step 1: Write the proportion equation
   56,387 : 89,288 = 89,288 : x
2. Step 2: Convert to fraction form
   56,387/89,288 = 89,288/x
3. Step 3: Cross multiply
   56,387x = 89,288 × 89,288
4. Step 4: Simplify right side
   56,387x = 7,972,346,944
5. Step 5: Solve for x
   x = 7,972,346,944/56,387
6. Step 6: Final answer
   x = 141,386.26