Finding the Third Proportional to 128,285 and 191,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,285 : 191,059.50 = 191,059.50 : x
2. Step 2: Convert to fraction form
   128,285/191,059.50 = 191,059.50/x
3. Step 3: Cross multiply
   128,285x = 191,059.50 × 191,059.50
4. Step 4: Simplify right side
   128,285x = 36,503,732,540.25
5. Step 5: Solve for x
   x = 36,503,732,540.25/128,285
6. Step 6: Final answer
   x = 284,551.84