Finding the Fourth Proportional to 885,144.78, 1,221,494.22 and 503,171.56

Step by Step Solution

1. Step 1: Write the proportion equation
   885,144.78 : 1,221,494.22 = 503,171.56 : x
2. Step 2: Convert to fraction form
   885,144.78/1,221,494.22 = 503,171.56/x
3. Step 3: Cross multiply
   885,144.78x = 1,221,494.22 × 503,171.56
4. Step 4: Simplify right side
   885,144.78x = 614,621,152,208.38
5. Step 5: Solve for x
   x = 614,621,152,208.38/885,144.78
6. Step 6: Final answer
   x = 694,373.58