Finding the Third Proportional to 619,438.50 and 908,688

Step by Step Solution

1. Step 1: Write the proportion equation
   619,438.50 : 908,688 = 908,688 : x
2. Step 2: Convert to fraction form
   619,438.50/908,688 = 908,688/x
3. Step 3: Cross multiply
   619,438.50x = 908,688 × 908,688
4. Step 4: Simplify right side
   619,438.50x = 825,713,881,344
5. Step 5: Solve for x
   x = 825,713,881,344/619,438.50
6. Step 6: Final answer
   x = 1,333,003.81