Finding the Third Proportional to 78,390.75 and 171,793.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,390.75 : 171,793.50 = 171,793.50 : x
2. Step 2: Convert to fraction form
   78,390.75/171,793.50 = 171,793.50/x
3. Step 3: Cross multiply
   78,390.75x = 171,793.50 × 171,793.50
4. Step 4: Simplify right side
   78,390.75x = 29,513,006,642.25
5. Step 5: Solve for x
   x = 29,513,006,642.25/78,390.75
6. Step 6: Final answer
   x = 376,485.83