Finding the Third Proportional to 72,308 and 149,229

Step by Step Solution

1. Step 1: Write the proportion equation
   72,308 : 149,229 = 149,229 : x
2. Step 2: Convert to fraction form
   72,308/149,229 = 149,229/x
3. Step 3: Cross multiply
   72,308x = 149,229 × 149,229
4. Step 4: Simplify right side
   72,308x = 22,269,294,441
5. Step 5: Solve for x
   x = 22,269,294,441/72,308
6. Step 6: Final answer
   x = 307,978.29