Finding the Fourth Proportional to 740,978.21, 1,022,550.93 and 401,446.46

Step by Step Solution

1. Step 1: Write the proportion equation
   740,978.21 : 1,022,550.93 = 401,446.46 : x
2. Step 2: Convert to fraction form
   740,978.21/1,022,550.93 = 401,446.46/x
3. Step 3: Cross multiply
   740,978.21x = 1,022,550.93 × 401,446.46
4. Step 4: Simplify right side
   740,978.21x = 410,499,445,905.45
5. Step 5: Solve for x
   x = 410,499,445,905.45/740,978.21
6. Step 6: Final answer
   x = 553,996.65