Finding the Third Proportional to 316,831.50 and 659,881.69

Step by Step Solution

1. Step 1: Write the proportion equation
   316,831.50 : 659,881.69 = 659,881.69 : x
2. Step 2: Convert to fraction form
   316,831.50/659,881.69 = 659,881.69/x
3. Step 3: Cross multiply
   316,831.50x = 659,881.69 × 659,881.69
4. Step 4: Simplify right side
   316,831.50x = 435,443,841,497.85
5. Step 5: Solve for x
   x = 435,443,841,497.85/316,831.50
6. Step 6: Final answer
   x = 1,374,370.42