Finding the Third Proportional to 42,490 and 67,505

Step by Step Solution

1. Step 1: Write the proportion equation
   42,490 : 67,505 = 67,505 : x
2. Step 2: Convert to fraction form
   42,490/67,505 = 67,505/x
3. Step 3: Cross multiply
   42,490x = 67,505 × 67,505
4. Step 4: Simplify right side
   42,490x = 4,556,925,025
5. Step 5: Solve for x
   x = 4,556,925,025/42,490
6. Step 6: Final answer
   x = 107,247.00