Finding the Third Proportional to 78,651 and 168,424.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,651 : 168,424.31 = 168,424.31 : x
2. Step 2: Convert to fraction form
   78,651/168,424.31 = 168,424.31/x
3. Step 3: Cross multiply
   78,651x = 168,424.31 × 168,424.31
4. Step 4: Simplify right side
   78,651x = 28,366,749,041.10
5. Step 5: Solve for x
   x = 28,366,749,041.10/78,651
6. Step 6: Final answer
   x = 360,666.10