Finding the Third Proportional to 90,328.50 and 139,779

Step by Step Solution

1. Step 1: Write the proportion equation
   90,328.50 : 139,779 = 139,779 : x
2. Step 2: Convert to fraction form
   90,328.50/139,779 = 139,779/x
3. Step 3: Cross multiply
   90,328.50x = 139,779 × 139,779
4. Step 4: Simplify right side
   90,328.50x = 19,538,168,841
5. Step 5: Solve for x
   x = 19,538,168,841/90,328.50
6. Step 6: Final answer
   x = 216,301.27