Finding the Third Proportional to 378,783.50 and 817,654

Step by Step Solution

1. Step 1: Write the proportion equation
   378,783.50 : 817,654 = 817,654 : x
2. Step 2: Convert to fraction form
   378,783.50/817,654 = 817,654/x
3. Step 3: Cross multiply
   378,783.50x = 817,654 × 817,654
4. Step 4: Simplify right side
   378,783.50x = 668,558,063,716
5. Step 5: Solve for x
   x = 668,558,063,716/378,783.50
6. Step 6: Final answer
   x = 1,765,013.69