Finding the Third Proportional to 57,469.50 and 89,211

Step by Step Solution

1. Step 1: Write the proportion equation
   57,469.50 : 89,211 = 89,211 : x
2. Step 2: Convert to fraction form
   57,469.50/89,211 = 89,211/x
3. Step 3: Cross multiply
   57,469.50x = 89,211 × 89,211
4. Step 4: Simplify right side
   57,469.50x = 7,958,602,521
5. Step 5: Solve for x
   x = 7,958,602,521/57,469.50
6. Step 6: Final answer
   x = 138,483.94