Finding the Fourth Proportional to 514,662.88, 771,969.60 and 140,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   514,662.88 : 771,969.60 = 140,686.72 : x
2. Step 2: Convert to fraction form
   514,662.88/771,969.60 = 140,686.72/x
3. Step 3: Cross multiply
   514,662.88x = 771,969.60 × 140,686.72
4. Step 4: Simplify right side
   514,662.88x = 108,605,870,963.71
5. Step 5: Solve for x
   x = 108,605,870,963.71/514,662.88
6. Step 6: Final answer
   x = 211,023.32