Finding the Third Proportional to 361,918.50 and 779,931

Step by Step Solution

1. Step 1: Write the proportion equation
   361,918.50 : 779,931 = 779,931 : x
2. Step 2: Convert to fraction form
   361,918.50/779,931 = 779,931/x
3. Step 3: Cross multiply
   361,918.50x = 779,931 × 779,931
4. Step 4: Simplify right side
   361,918.50x = 608,292,364,761
5. Step 5: Solve for x
   x = 608,292,364,761/361,918.50
6. Step 6: Final answer
   x = 1,680,744.05