Finding the Third Proportional to 57,388.50 and 89,079.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,388.50 : 89,079.75 = 89,079.75 : x
2. Step 2: Convert to fraction form
   57,388.50/89,079.75 = 89,079.75/x
3. Step 3: Cross multiply
   57,388.50x = 89,079.75 × 89,079.75
4. Step 4: Simplify right side
   57,388.50x = 7,935,201,860.06
5. Step 5: Solve for x
   x = 7,935,201,860.06/57,388.50
6. Step 6: Final answer
   x = 138,271.64