Finding the Third Proportional to 90,688 and 140,896

Step by Step Solution

1. Step 1: Write the proportion equation
   90,688 : 140,896 = 140,896 : x
2. Step 2: Convert to fraction form
   90,688/140,896 = 140,896/x
3. Step 3: Cross multiply
   90,688x = 140,896 × 140,896
4. Step 4: Simplify right side
   90,688x = 19,851,682,816
5. Step 5: Solve for x
   x = 19,851,682,816/90,688
6. Step 6: Final answer
   x = 218,900.88