Finding the Third Proportional to 69,231 and 149,071.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,231 : 149,071.50 = 149,071.50 : x
2. Step 2: Convert to fraction form
   69,231/149,071.50 = 149,071.50/x
3. Step 3: Cross multiply
   69,231x = 149,071.50 × 149,071.50
4. Step 4: Simplify right side
   69,231x = 22,222,312,112.25
5. Step 5: Solve for x
   x = 22,222,312,112.25/69,231
6. Step 6: Final answer
   x = 320,987.88