Finding the Third Proportional to 67,142.25 and 90,865.13

Step by Step Solution

1. Step 1: Write the proportion equation
   67,142.25 : 90,865.13 = 90,865.13 : x
2. Step 2: Convert to fraction form
   67,142.25/90,865.13 = 90,865.13/x
3. Step 3: Cross multiply
   67,142.25x = 90,865.13 × 90,865.13
4. Step 4: Simplify right side
   67,142.25x = 8,256,470,941.27
5. Step 5: Solve for x
   x = 8,256,470,941.27/67,142.25
6. Step 6: Final answer
   x = 122,969.83