Finding the Third Proportional to 90,688 and 142,988

Step by Step Solution

1. Step 1: Write the proportion equation
   90,688 : 142,988 = 142,988 : x
2. Step 2: Convert to fraction form
   90,688/142,988 = 142,988/x
3. Step 3: Cross multiply
   90,688x = 142,988 × 142,988
4. Step 4: Simplify right side
   90,688x = 20,445,568,144
5. Step 5: Solve for x
   x = 20,445,568,144/90,688
6. Step 6: Final answer
   x = 225,449.54