Finding the Third Proportional to 67,891.50 and 140,298.75

Step by Step Solution

1. Step 1: Write the proportion equation
   67,891.50 : 140,298.75 = 140,298.75 : x
2. Step 2: Convert to fraction form
   67,891.50/140,298.75 = 140,298.75/x
3. Step 3: Cross multiply
   67,891.50x = 140,298.75 × 140,298.75
4. Step 4: Simplify right side
   67,891.50x = 19,683,739,251.56
5. Step 5: Solve for x
   x = 19,683,739,251.56/67,891.50
6. Step 6: Final answer
   x = 289,929.36