Finding the Fourth Proportional to 518,065.50, 777,142.26 and 144,088.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,065.50 : 777,142.26 = 144,088.50 : x
2. Step 2: Convert to fraction form
   518,065.50/777,142.26 = 144,088.50/x
3. Step 3: Cross multiply
   518,065.50x = 777,142.26 × 144,088.50
4. Step 4: Simplify right side
   518,065.50x = 111,977,262,530.01
5. Step 5: Solve for x
   x = 111,977,262,530.01/518,065.50
6. Step 6: Final answer
   x = 216,144.99