Finding the Third Proportional to 88,890 and 188,236.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,890 : 188,236.50 = 188,236.50 : x
2. Step 2: Convert to fraction form
   88,890/188,236.50 = 188,236.50/x
3. Step 3: Cross multiply
   88,890x = 188,236.50 × 188,236.50
4. Step 4: Simplify right side
   88,890x = 35,432,979,932.25
5. Step 5: Solve for x
   x = 35,432,979,932.25/88,890
6. Step 6: Final answer
   x = 398,616.04