Finding the Fourth Proportional to 419,112.58, 628,662.72 and 103,569.49

Step by Step Solution

1. Step 1: Write the proportion equation
   419,112.58 : 628,662.72 = 103,569.49 : x
2. Step 2: Convert to fraction form
   419,112.58/628,662.72 = 103,569.49/x
3. Step 3: Cross multiply
   419,112.58x = 628,662.72 × 103,569.49
4. Step 4: Simplify right side
   419,112.58x = 65,110,274,347.82
5. Step 5: Solve for x
   x = 65,110,274,347.82/419,112.58
6. Step 6: Final answer
   x = 155,352.71