Finding the Third Proportional to 58,142 and 89,481

Step by Step Solution

1. Step 1: Write the proportion equation
   58,142 : 89,481 = 89,481 : x
2. Step 2: Convert to fraction form
   58,142/89,481 = 89,481/x
3. Step 3: Cross multiply
   58,142x = 89,481 × 89,481
4. Step 4: Simplify right side
   58,142x = 8,006,849,361
5. Step 5: Solve for x
   x = 8,006,849,361/58,142
6. Step 6: Final answer
   x = 137,711.97