Finding the Fourth Proportional to 518,062.50, 777,137.49 and 144,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,062.50 : 777,137.49 = 144,085.50 : x
2. Step 2: Convert to fraction form
   518,062.50/777,137.49 = 144,085.50/x
3. Step 3: Cross multiply
   518,062.50x = 777,137.49 × 144,085.50
4. Step 4: Simplify right side
   518,062.50x = 111,974,243,815.40
5. Step 5: Solve for x
   x = 111,974,243,815.40/518,062.50
6. Step 6: Final answer
   x = 216,140.42