Finding the Fourth Proportional to 284,730.56, 427,095.77 and 260,971.37

Step by Step Solution

1. Step 1: Write the proportion equation
   284,730.56 : 427,095.77 = 260,971.37 : x
2. Step 2: Convert to fraction form
   284,730.56/427,095.77 = 260,971.37/x
3. Step 3: Cross multiply
   284,730.56x = 427,095.77 × 260,971.37
4. Step 4: Simplify right side
   284,730.56x = 111,459,764,777.77
5. Step 5: Solve for x
   x = 111,459,764,777.77/284,730.56
6. Step 6: Final answer
   x = 391,456.99