Finding the Fourth Proportional to 419,123.50, 628,700.55 and 149,271.51

Step by Step Solution

1. Step 1: Write the proportion equation
   419,123.50 : 628,700.55 = 149,271.51 : x
2. Step 2: Convert to fraction form
   419,123.50/628,700.55 = 149,271.51/x
3. Step 3: Cross multiply
   419,123.50x = 628,700.55 × 149,271.51
4. Step 4: Simplify right side
   419,123.50x = 93,847,080,436.33
5. Step 5: Solve for x
   x = 93,847,080,436.33/419,123.50
6. Step 6: Final answer
   x = 223,912.71