Finding the Third Proportional to 615,906 and 921,370.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,906 : 921,370.50 = 921,370.50 : x
2. Step 2: Convert to fraction form
   615,906/921,370.50 = 921,370.50/x
3. Step 3: Cross multiply
   615,906x = 921,370.50 × 921,370.50
4. Step 4: Simplify right side
   615,906x = 848,923,598,270.25
5. Step 5: Solve for x
   x = 848,923,598,270.25/615,906
6. Step 6: Final answer
   x = 1,378,333.05