Finding the Fourth Proportional to 428,903.51, 591,957.52 and 237,978.41

Step by Step Solution

1. Step 1: Write the proportion equation
   428,903.51 : 591,957.52 = 237,978.41 : x
2. Step 2: Convert to fraction form
   428,903.51/591,957.52 = 237,978.41/x
3. Step 3: Cross multiply
   428,903.51x = 591,957.52 × 237,978.41
4. Step 4: Simplify right side
   428,903.51x = 140,873,105,842.41
5. Step 5: Solve for x
   x = 140,873,105,842.41/428,903.51
6. Step 6: Final answer
   x = 328,449.42