Finding the Third Proportional to 369,669 and 557,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   369,669 : 557,131.50 = 557,131.50 : x
2. Step 2: Convert to fraction form
   369,669/557,131.50 = 557,131.50/x
3. Step 3: Cross multiply
   369,669x = 557,131.50 × 557,131.50
4. Step 4: Simplify right side
   369,669x = 310,395,508,292.25
5. Step 5: Solve for x
   x = 310,395,508,292.25/369,669
6. Step 6: Final answer
   x = 839,657.93