Finding the Fourth Proportional to 518,067.50, 777,145.26 and 144,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,067.50 : 777,145.26 = 144,090.50 : x
2. Step 2: Convert to fraction form
   518,067.50/777,145.26 = 144,090.50/x
3. Step 3: Cross multiply
   518,067.50x = 777,145.26 × 144,090.50
4. Step 4: Simplify right side
   518,067.50x = 111,979,249,086.03
5. Step 5: Solve for x
   x = 111,979,249,086.03/518,067.50
6. Step 6: Final answer
   x = 216,147.99