Finding the Third Proportional to 310,945.50 and 666,117

Step by Step Solution

1. Step 1: Write the proportion equation
   310,945.50 : 666,117 = 666,117 : x
2. Step 2: Convert to fraction form
   310,945.50/666,117 = 666,117/x
3. Step 3: Cross multiply
   310,945.50x = 666,117 × 666,117
4. Step 4: Simplify right side
   310,945.50x = 443,711,857,689
5. Step 5: Solve for x
   x = 443,711,857,689/310,945.50
6. Step 6: Final answer
   x = 1,426,976.30