Finding the Fourth Proportional to 831,607.72, 1,247,565.42 and 263,131.94

Step by Step Solution

1. Step 1: Write the proportion equation
   831,607.72 : 1,247,565.42 = 263,131.94 : x
2. Step 2: Convert to fraction form
   831,607.72/1,247,565.42 = 263,131.94/x
3. Step 3: Cross multiply
   831,607.72x = 1,247,565.42 × 263,131.94
4. Step 4: Simplify right side
   831,607.72x = 328,274,309,241.52
5. Step 5: Solve for x
   x = 328,274,309,241.52/831,607.72
6. Step 6: Final answer
   x = 394,746.59