Finding the Third Proportional to 67,086 and 90,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,086 : 90,787.50 = 90,787.50 : x
2. Step 2: Convert to fraction form
   67,086/90,787.50 = 90,787.50/x
3. Step 3: Cross multiply
   67,086x = 90,787.50 × 90,787.50
4. Step 4: Simplify right side
   67,086x = 8,242,370,156.25
5. Step 5: Solve for x
   x = 8,242,370,156.25/67,086
6. Step 6: Final answer
   x = 122,862.75