Finding the Third Proportional to 67,140 and 90,324

Step by Step Solution

1. Step 1: Write the proportion equation
   67,140 : 90,324 = 90,324 : x
2. Step 2: Convert to fraction form
   67,140/90,324 = 90,324/x
3. Step 3: Cross multiply
   67,140x = 90,324 × 90,324
4. Step 4: Simplify right side
   67,140x = 8,158,424,976
5. Step 5: Solve for x
   x = 8,158,424,976/67,140
6. Step 6: Final answer
   x = 121,513.63