Finding the Third Proportional to 67,156 and 90,871

Step by Step Solution

1. Step 1: Write the proportion equation
   67,156 : 90,871 = 90,871 : x
2. Step 2: Convert to fraction form
   67,156/90,871 = 90,871/x
3. Step 3: Cross multiply
   67,156x = 90,871 × 90,871
4. Step 4: Simplify right side
   67,156x = 8,257,538,641
5. Step 5: Solve for x
   x = 8,257,538,641/67,156
6. Step 6: Final answer
   x = 122,960.55