Finding the Third Proportional to 69,912 and 149,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,912 : 149,710.50 = 149,710.50 : x
2. Step 2: Convert to fraction form
   69,912/149,710.50 = 149,710.50/x
3. Step 3: Cross multiply
   69,912x = 149,710.50 × 149,710.50
4. Step 4: Simplify right side
   69,912x = 22,413,233,810.25
5. Step 5: Solve for x
   x = 22,413,233,810.25/69,912
6. Step 6: Final answer
   x = 320,592.08