Finding the Third Proportional to 91,728.56 and 140,328.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,728.56 : 140,328.56 = 140,328.56 : x
2. Step 2: Convert to fraction form
   91,728.56/140,328.56 = 140,328.56/x
3. Step 3: Cross multiply
   91,728.56x = 140,328.56 × 140,328.56
4. Step 4: Simplify right side
   91,728.56x = 19,692,105,453.32
5. Step 5: Solve for x
   x = 19,692,105,453.32/91,728.56
6. Step 6: Final answer
   x = 214,678.01