Finding the Third Proportional to 28,940 and 63,420

Step by Step Solution

1. Step 1: Write the proportion equation
   28,940 : 63,420 = 63,420 : x
2. Step 2: Convert to fraction form
   28,940/63,420 = 63,420/x
3. Step 3: Cross multiply
   28,940x = 63,420 × 63,420
4. Step 4: Simplify right side
   28,940x = 4,022,096,400
5. Step 5: Solve for x
   x = 4,022,096,400/28,940
6. Step 6: Final answer
   x = 138,980.53