Finding the Fourth Proportional to 428,667.31, 591,552.07 and 237,679.03

Step by Step Solution

1. Step 1: Write the proportion equation
   428,667.31 : 591,552.07 = 237,679.03 : x
2. Step 2: Convert to fraction form
   428,667.31/591,552.07 = 237,679.03/x
3. Step 3: Cross multiply
   428,667.31x = 591,552.07 × 237,679.03
4. Step 4: Simplify right side
   428,667.31x = 140,599,522,192.09
5. Step 5: Solve for x
   x = 140,599,522,192.09/428,667.31
6. Step 6: Final answer
   x = 327,992.17