Finding the Third Proportional to 57,408.75 and 89,256.94

Step by Step Solution

1. Step 1: Write the proportion equation
   57,408.75 : 89,256.94 = 89,256.94 : x
2. Step 2: Convert to fraction form
   57,408.75/89,256.94 = 89,256.94/x
3. Step 3: Cross multiply
   57,408.75x = 89,256.94 × 89,256.94
4. Step 4: Simplify right side
   57,408.75x = 7,966,800,891.88
5. Step 5: Solve for x
   x = 7,966,800,891.88/57,408.75
6. Step 6: Final answer
   x = 138,773.29