Finding the Third Proportional to 57,060.70 and 89,045.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,060.70 : 89,045.42 = 89,045.42 : x
2. Step 2: Convert to fraction form
   57,060.70/89,045.42 = 89,045.42/x
3. Step 3: Cross multiply
   57,060.70x = 89,045.42 × 89,045.42
4. Step 4: Simplify right side
   57,060.70x = 7,929,086,809.06
5. Step 5: Solve for x
   x = 7,929,086,809.06/57,060.70
6. Step 6: Final answer
   x = 138,958.80