Finding the Third Proportional to 57,729 and 90,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,729 : 90,238.50 = 90,238.50 : x
2. Step 2: Convert to fraction form
   57,729/90,238.50 = 90,238.50/x
3. Step 3: Cross multiply
   57,729x = 90,238.50 × 90,238.50
4. Step 4: Simplify right side
   57,729x = 8,142,986,882.25
5. Step 5: Solve for x
   x = 8,142,986,882.25/57,729
6. Step 6: Final answer
   x = 141,055.39