Finding the Third Proportional to 57,431 and 89,063

Step by Step Solution

1. Step 1: Write the proportion equation
   57,431 : 89,063 = 89,063 : x
2. Step 2: Convert to fraction form
   57,431/89,063 = 89,063/x
3. Step 3: Cross multiply
   57,431x = 89,063 × 89,063
4. Step 4: Simplify right side
   57,431x = 7,932,217,969
5. Step 5: Solve for x
   x = 7,932,217,969/57,431
6. Step 6: Final answer
   x = 138,117.36