Finding the Third Proportional to 74,280 and 109,779

Step by Step Solution

1. Step 1: Write the proportion equation
   74,280 : 109,779 = 109,779 : x
2. Step 2: Convert to fraction form
   74,280/109,779 = 109,779/x
3. Step 3: Cross multiply
   74,280x = 109,779 × 109,779
4. Step 4: Simplify right side
   74,280x = 12,051,428,841
5. Step 5: Solve for x
   x = 12,051,428,841/74,280
6. Step 6: Final answer
   x = 162,243.25