Finding the Fourth Proportional to 740,669.58, 1,022,123.07 and 401,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   740,669.58 : 1,022,123.07 = 401,139.18 : x
2. Step 2: Convert to fraction form
   740,669.58/1,022,123.07 = 401,139.18/x
3. Step 3: Cross multiply
   740,669.58x = 1,022,123.07 × 401,139.18
4. Step 4: Simplify right side
   740,669.58x = 410,013,610,158.88
5. Step 5: Solve for x
   x = 410,013,610,158.88/740,669.58
6. Step 6: Final answer
   x = 553,571.55