Finding the Fourth Proportional to 724,419.27, 999,648.56 and 402,103.98

Step by Step Solution

1. Step 1: Write the proportion equation
   724,419.27 : 999,648.56 = 402,103.98 : x
2. Step 2: Convert to fraction form
   724,419.27/999,648.56 = 402,103.98/x
3. Step 3: Cross multiply
   724,419.27x = 999,648.56 × 402,103.98
4. Step 4: Simplify right side
   724,419.27x = 401,962,665,582.53
5. Step 5: Solve for x
   x = 401,962,665,582.53/724,419.27
6. Step 6: Final answer
   x = 554,875.72