Finding the Fourth Proportional to 518,068.50, 777,146.76 and 144,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,068.50 : 777,146.76 = 144,091.50 : x
2. Step 2: Convert to fraction form
   518,068.50/777,146.76 = 144,091.50/x
3. Step 3: Cross multiply
   518,068.50x = 777,146.76 × 144,091.50
4. Step 4: Simplify right side
   518,068.50x = 111,980,242,368.54
5. Step 5: Solve for x
   x = 111,980,242,368.54/518,068.50
6. Step 6: Final answer
   x = 216,149.49