Finding the Third Proportional to 378,116.50 and 816,402

Step by Step Solution

1. Step 1: Write the proportion equation
   378,116.50 : 816,402 = 816,402 : x
2. Step 2: Convert to fraction form
   378,116.50/816,402 = 816,402/x
3. Step 3: Cross multiply
   378,116.50x = 816,402 × 816,402
4. Step 4: Simplify right side
   378,116.50x = 666,512,225,604
5. Step 5: Solve for x
   x = 666,512,225,604/378,116.50
6. Step 6: Final answer
   x = 1,762,716.58