Finding the Fourth Proportional to 723,173.35, 997,912.17 and 400,856.03

Step by Step Solution

1. Step 1: Write the proportion equation
   723,173.35 : 997,912.17 = 400,856.03 : x
2. Step 2: Convert to fraction form
   723,173.35/997,912.17 = 400,856.03/x
3. Step 3: Cross multiply
   723,173.35x = 997,912.17 × 400,856.03
4. Step 4: Simplify right side
   723,173.35x = 400,019,110,754.89
5. Step 5: Solve for x
   x = 400,019,110,754.89/723,173.35
6. Step 6: Final answer
   x = 553,144.15