Finding the Third Proportional to 78,406.50 and 169,389

Step by Step Solution

1. Step 1: Write the proportion equation
   78,406.50 : 169,389 = 169,389 : x
2. Step 2: Convert to fraction form
   78,406.50/169,389 = 169,389/x
3. Step 3: Cross multiply
   78,406.50x = 169,389 × 169,389
4. Step 4: Simplify right side
   78,406.50x = 28,692,633,321
5. Step 5: Solve for x
   x = 28,692,633,321/78,406.50
6. Step 6: Final answer
   x = 365,947.13