Finding the Fourth Proportional to 723,175.31, 997,914.82 and 400,857.98

Step by Step Solution

1. Step 1: Write the proportion equation
   723,175.31 : 997,914.82 = 400,857.98 : x
2. Step 2: Convert to fraction form
   723,175.31/997,914.82 = 400,857.98/x
3. Step 3: Cross multiply
   723,175.31x = 997,914.82 × 400,857.98
4. Step 4: Simplify right side
   723,175.31x = 400,022,111,963.40
5. Step 5: Solve for x
   x = 400,022,111,963.40/723,175.31
6. Step 6: Final answer
   x = 553,146.81