Finding the Third Proportional to 378,693 and 816,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,693 : 816,430.50 = 816,430.50 : x
2. Step 2: Convert to fraction form
   378,693/816,430.50 = 816,430.50/x
3. Step 3: Cross multiply
   378,693x = 816,430.50 × 816,430.50
4. Step 4: Simplify right side
   378,693x = 666,558,761,330.25
5. Step 5: Solve for x
   x = 666,558,761,330.25/378,693
6. Step 6: Final answer
   x = 1,760,156.01