Finding the Fourth Proportional to 428,772.17, 591,690.71 and 237,803.33

Step by Step Solution

1. Step 1: Write the proportion equation
   428,772.17 : 591,690.71 = 237,803.33 : x
2. Step 2: Convert to fraction form
   428,772.17/591,690.71 = 237,803.33/x
3. Step 3: Cross multiply
   428,772.17x = 591,690.71 × 237,803.33
4. Step 4: Simplify right side
   428,772.17x = 140,706,017,020.59
5. Step 5: Solve for x
   x = 140,706,017,020.59/428,772.17
6. Step 6: Final answer
   x = 328,160.33