Finding the Fourth Proportional to 722,760, 997,408.80 and 404,808

Step by Step Solution

1. Step 1: Write the proportion equation
   722,760 : 997,408.80 = 404,808 : x
2. Step 2: Convert to fraction form
   722,760/997,408.80 = 404,808/x
3. Step 3: Cross multiply
   722,760x = 997,408.80 × 404,808
4. Step 4: Simplify right side
   722,760x = 403,759,061,510.40
5. Step 5: Solve for x
   x = 403,759,061,510.40/722,760
6. Step 6: Final answer
   x = 558,635.04