Finding the Third Proportional to 60,722.50 and 91,931

Step by Step Solution

1. Step 1: Write the proportion equation
   60,722.50 : 91,931 = 91,931 : x
2. Step 2: Convert to fraction form
   60,722.50/91,931 = 91,931/x
3. Step 3: Cross multiply
   60,722.50x = 91,931 × 91,931
4. Step 4: Simplify right side
   60,722.50x = 8,451,308,761
5. Step 5: Solve for x
   x = 8,451,308,761/60,722.50
6. Step 6: Final answer
   x = 139,179.20