Finding the Fourth Proportional to 518,578.31, 777,998.69 and 144,601.31

Step by Step Solution

1. Step 1: Write the proportion equation
   518,578.31 : 777,998.69 = 144,601.31 : x
2. Step 2: Convert to fraction form
   518,578.31/777,998.69 = 144,601.31/x
3. Step 3: Cross multiply
   518,578.31x = 777,998.69 × 144,601.31
4. Step 4: Simplify right side
   518,578.31x = 112,499,631,516.53
5. Step 5: Solve for x
   x = 112,499,631,516.53/518,578.31
6. Step 6: Final answer
   x = 216,938.56