Finding the Third Proportional to 30,578 and 63,118

Step by Step Solution

1. Step 1: Write the proportion equation
   30,578 : 63,118 = 63,118 : x
2. Step 2: Convert to fraction form
   30,578/63,118 = 63,118/x
3. Step 3: Cross multiply
   30,578x = 63,118 × 63,118
4. Step 4: Simplify right side
   30,578x = 3,983,881,924
5. Step 5: Solve for x
   x = 3,983,881,924/30,578
6. Step 6: Final answer
   x = 130,285.89