Finding the Third Proportional to 666,306 and 998,365.50

Step by Step Solution

1. Step 1: Write the proportion equation
   666,306 : 998,365.50 = 998,365.50 : x
2. Step 2: Convert to fraction form
   666,306/998,365.50 = 998,365.50/x
3. Step 3: Cross multiply
   666,306x = 998,365.50 × 998,365.50
4. Step 4: Simplify right side
   666,306x = 996,733,671,590.25
5. Step 5: Solve for x
   x = 996,733,671,590.25/666,306
6. Step 6: Final answer
   x = 1,495,909.79