Finding the Fourth Proportional to 860,401.82, 1,291,171.26 and 405,123.27

Step by Step Solution

1. Step 1: Write the proportion equation
   860,401.82 : 1,291,171.26 = 405,123.27 : x
2. Step 2: Convert to fraction form
   860,401.82/1,291,171.26 = 405,123.27/x
3. Step 3: Cross multiply
   860,401.82x = 1,291,171.26 × 405,123.27
4. Step 4: Simplify right side
   860,401.82x = 523,083,522,981.22
5. Step 5: Solve for x
   x = 523,083,522,981.22/860,401.82
6. Step 6: Final answer
   x = 607,952.60