Finding the Third Proportional to 90,031.50 and 145,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,031.50 : 145,435.50 = 145,435.50 : x
2. Step 2: Convert to fraction form
   90,031.50/145,435.50 = 145,435.50/x
3. Step 3: Cross multiply
   90,031.50x = 145,435.50 × 145,435.50
4. Step 4: Simplify right side
   90,031.50x = 21,151,484,660.25
5. Step 5: Solve for x
   x = 21,151,484,660.25/90,031.50
6. Step 6: Final answer
   x = 234,934.27