Finding the Third Proportional to 90,240 and 140,281.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,240 : 140,281.50 = 140,281.50 : x
2. Step 2: Convert to fraction form
   90,240/140,281.50 = 140,281.50/x
3. Step 3: Cross multiply
   90,240x = 140,281.50 × 140,281.50
4. Step 4: Simplify right side
   90,240x = 19,678,899,242.25
5. Step 5: Solve for x
   x = 19,678,899,242.25/90,240
6. Step 6: Final answer
   x = 218,072.91