Finding the Third Proportional to 90,454 and 138,030

Step by Step Solution

1. Step 1: Write the proportion equation
   90,454 : 138,030 = 138,030 : x
2. Step 2: Convert to fraction form
   90,454/138,030 = 138,030/x
3. Step 3: Cross multiply
   90,454x = 138,030 × 138,030
4. Step 4: Simplify right side
   90,454x = 19,052,280,900
5. Step 5: Solve for x
   x = 19,052,280,900/90,454
6. Step 6: Final answer
   x = 210,629.50