Finding the Third Proportional to 30,878 and 63,940

Step by Step Solution

1. Step 1: Write the proportion equation
   30,878 : 63,940 = 63,940 : x
2. Step 2: Convert to fraction form
   30,878/63,940 = 63,940/x
3. Step 3: Cross multiply
   30,878x = 63,940 × 63,940
4. Step 4: Simplify right side
   30,878x = 4,088,323,600
5. Step 5: Solve for x
   x = 4,088,323,600/30,878
6. Step 6: Final answer
   x = 132,402.47