Finding the Third Proportional to 78,122.25 and 168,111

Step by Step Solution

1. Step 1: Write the proportion equation
   78,122.25 : 168,111 = 168,111 : x
2. Step 2: Convert to fraction form
   78,122.25/168,111 = 168,111/x
3. Step 3: Cross multiply
   78,122.25x = 168,111 × 168,111
4. Step 4: Simplify right side
   78,122.25x = 28,261,308,321
5. Step 5: Solve for x
   x = 28,261,308,321/78,122.25
6. Step 6: Final answer
   x = 361,757.48