Finding the Fourth Proportional to 308,116.56, 462,168.68 and 139,605.48

Step by Step Solution

1. Step 1: Write the proportion equation
   308,116.56 : 462,168.68 = 139,605.48 : x
2. Step 2: Convert to fraction form
   308,116.56/462,168.68 = 139,605.48/x
3. Step 3: Cross multiply
   308,116.56x = 462,168.68 × 139,605.48
4. Step 4: Simplify right side
   308,116.56x = 64,521,278,101.52
5. Step 5: Solve for x
   x = 64,521,278,101.52/308,116.56
6. Step 6: Final answer
   x = 209,405.42