Finding the Fourth Proportional to 308,789.31, 462,705.71 and 214,203.45

Step by Step Solution

1. Step 1: Write the proportion equation
   308,789.31 : 462,705.71 = 214,203.45 : x
2. Step 2: Convert to fraction form
   308,789.31/462,705.71 = 214,203.45/x
3. Step 3: Cross multiply
   308,789.31x = 462,705.71 × 214,203.45
4. Step 4: Simplify right side
   308,789.31x = 99,113,158,345.68
5. Step 5: Solve for x
   x = 99,113,158,345.68/308,789.31
6. Step 6: Final answer
   x = 320,973.41