Finding the Fourth Proportional to 518,008.50, 777,056.76 and 144,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,008.50 : 777,056.76 = 144,031.50 : x
2. Step 2: Convert to fraction form
   518,008.50/777,056.76 = 144,031.50/x
3. Step 3: Cross multiply
   518,008.50x = 777,056.76 × 144,031.50
4. Step 4: Simplify right side
   518,008.50x = 111,920,650,727.94
5. Step 5: Solve for x
   x = 111,920,650,727.94/518,008.50
6. Step 6: Final answer
   x = 216,059.49