Finding the Third Proportional to 178,945.88 and 389,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   178,945.88 : 389,380.50 = 389,380.50 : x
2. Step 2: Convert to fraction form
   178,945.88/389,380.50 = 389,380.50/x
3. Step 3: Cross multiply
   178,945.88x = 389,380.50 × 389,380.50
4. Step 4: Simplify right side
   178,945.88x = 151,617,173,780.25
5. Step 5: Solve for x
   x = 151,617,173,780.25/178,945.88
6. Step 6: Final answer
   x = 847,279.51