Finding the Fourth Proportional to 724,421.27, 999,651.32 and 402,105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   724,421.27 : 999,651.32 = 402,105.98 : x
2. Step 2: Convert to fraction form
   724,421.27/999,651.32 = 402,105.98/x
3. Step 3: Cross multiply
   724,421.27x = 999,651.32 × 402,105.98
4. Step 4: Simplify right side
   724,421.27x = 401,965,773,686.89
5. Step 5: Solve for x
   x = 401,965,773,686.89/724,421.27
6. Step 6: Final answer
   x = 554,878.48