Finding the Third Proportional to 306,385.50 and 711,972

Step by Step Solution

1. Step 1: Write the proportion equation
   306,385.50 : 711,972 = 711,972 : x
2. Step 2: Convert to fraction form
   306,385.50/711,972 = 711,972/x
3. Step 3: Cross multiply
   306,385.50x = 711,972 × 711,972
4. Step 4: Simplify right side
   306,385.50x = 506,904,128,784
5. Step 5: Solve for x
   x = 506,904,128,784/306,385.50
6. Step 6: Final answer
   x = 1,654,465.14