Finding the Third Proportional to 42,490 and 67,484.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,490 : 67,484.50 = 67,484.50 : x
2. Step 2: Convert to fraction form
   42,490/67,484.50 = 67,484.50/x
3. Step 3: Cross multiply
   42,490x = 67,484.50 × 67,484.50
4. Step 4: Simplify right side
   42,490x = 4,554,157,740.25
5. Step 5: Solve for x
   x = 4,554,157,740.25/42,490
6. Step 6: Final answer
   x = 107,181.87