Finding the Fourth Proportional to 740,978.24, 1,022,554.56 and 401,446.40

Step by Step Solution

1. Step 1: Write the proportion equation
   740,978.24 : 1,022,554.56 = 401,446.40 : x
2. Step 2: Convert to fraction form
   740,978.24/1,022,554.56 = 401,446.40/x
3. Step 3: Cross multiply
   740,978.24x = 1,022,554.56 × 401,446.40
4. Step 4: Simplify right side
   740,978.24x = 410,500,846,915.58
5. Step 5: Solve for x
   x = 410,500,846,915.58/740,978.24
6. Step 6: Final answer
   x = 553,998.52