Finding the Third Proportional to 80,483.78 and 128,113.52

Step by Step Solution

1. Step 1: Write the proportion equation
   80,483.78 : 128,113.52 = 128,113.52 : x
2. Step 2: Convert to fraction form
   80,483.78/128,113.52 = 128,113.52/x
3. Step 3: Cross multiply
   80,483.78x = 128,113.52 × 128,113.52
4. Step 4: Simplify right side
   80,483.78x = 16,413,074,887.57
5. Step 5: Solve for x
   x = 16,413,074,887.57/80,483.78
6. Step 6: Final answer
   x = 203,930.21