Finding the Third Proportional to 316,696 and 490,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,696 : 490,791.50 = 490,791.50 : x
2. Step 2: Convert to fraction form
   316,696/490,791.50 = 490,791.50/x
3. Step 3: Cross multiply
   316,696x = 490,791.50 × 490,791.50
4. Step 4: Simplify right side
   316,696x = 240,876,296,472.25
5. Step 5: Solve for x
   x = 240,876,296,472.25/316,696
6. Step 6: Final answer
   x = 760,591.53