Finding the Third Proportional to 57,135 and 89,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,135 : 89,347.50 = 89,347.50 : x
2. Step 2: Convert to fraction form
   57,135/89,347.50 = 89,347.50/x
3. Step 3: Cross multiply
   57,135x = 89,347.50 × 89,347.50
4. Step 4: Simplify right side
   57,135x = 7,982,975,756.25
5. Step 5: Solve for x
   x = 7,982,975,756.25/57,135
6. Step 6: Final answer
   x = 139,721.29