Finding the Third Proportional to 66,913.31 and 90,831.94

Step by Step Solution

1. Step 1: Write the proportion equation
   66,913.31 : 90,831.94 = 90,831.94 : x
2. Step 2: Convert to fraction form
   66,913.31/90,831.94 = 90,831.94/x
3. Step 3: Cross multiply
   66,913.31x = 90,831.94 × 90,831.94
4. Step 4: Simplify right side
   66,913.31x = 8,250,440,870.00
5. Step 5: Solve for x
   x = 8,250,440,870.00/66,913.31
6. Step 6: Final answer
   x = 123,300.44