Finding the Fourth Proportional to 722,978.80, 997,710.83 and 400,709.69

Step by Step Solution

1. Step 1: Write the proportion equation
   722,978.80 : 997,710.83 = 400,709.69 : x
2. Step 2: Convert to fraction form
   722,978.80/997,710.83 = 400,709.69/x
3. Step 3: Cross multiply
   722,978.80x = 997,710.83 × 400,709.69
4. Step 4: Simplify right side
   722,978.80x = 399,792,397,398.94
5. Step 5: Solve for x
   x = 399,792,397,398.94/722,978.80
6. Step 6: Final answer
   x = 552,979.42