Finding the Fourth Proportional to 648,442.78, 892,870.12 and 587,617.69

Step by Step Solution

1. Step 1: Write the proportion equation
   648,442.78 : 892,870.12 = 587,617.69 : x
2. Step 2: Convert to fraction form
   648,442.78/892,870.12 = 587,617.69/x
3. Step 3: Cross multiply
   648,442.78x = 892,870.12 × 587,617.69
4. Step 4: Simplify right side
   648,442.78x = 524,666,277,384.42
5. Step 5: Solve for x
   x = 524,666,277,384.42/648,442.78
6. Step 6: Final answer
   x = 809,117.31