Finding the Third Proportional to 140,540.91 and 309,101.06

Step by Step Solution

1. Step 1: Write the proportion equation
   140,540.91 : 309,101.06 = 309,101.06 : x
2. Step 2: Convert to fraction form
   140,540.91/309,101.06 = 309,101.06/x
3. Step 3: Cross multiply
   140,540.91x = 309,101.06 × 309,101.06
4. Step 4: Simplify right side
   140,540.91x = 95,543,466,838.63
5. Step 5: Solve for x
   x = 95,543,466,838.63/140,540.91
6. Step 6: Final answer
   x = 679,826.75