Finding the Third Proportional to 90,310.57 and 140,636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,310.57 : 140,636.25 = 140,636.25 : x
2. Step 2: Convert to fraction form
   90,310.57/140,636.25 = 140,636.25/x
3. Step 3: Cross multiply
   90,310.57x = 140,636.25 × 140,636.25
4. Step 4: Simplify right side
   90,310.57x = 19,778,554,814.06
5. Step 5: Solve for x
   x = 19,778,554,814.06/90,310.57
6. Step 6: Final answer
   x = 219,005.98