Finding the Third Proportional to 615,671.50 and 921,030

Step by Step Solution

1. Step 1: Write the proportion equation
   615,671.50 : 921,030 = 921,030 : x
2. Step 2: Convert to fraction form
   615,671.50/921,030 = 921,030/x
3. Step 3: Cross multiply
   615,671.50x = 921,030 × 921,030
4. Step 4: Simplify right side
   615,671.50x = 848,296,260,900
5. Step 5: Solve for x
   x = 848,296,260,900/615,671.50
6. Step 6: Final answer
   x = 1,377,839.09