Finding the Fourth Proportional to 428,970.28, 591,979.72 and 237,983.72

Step by Step Solution

1. Step 1: Write the proportion equation
   428,970.28 : 591,979.72 = 237,983.72 : x
2. Step 2: Convert to fraction form
   428,970.28/591,979.72 = 237,983.72/x
3. Step 3: Cross multiply
   428,970.28x = 591,979.72 × 237,983.72
4. Step 4: Simplify right side
   428,970.28x = 140,881,535,930.16
5. Step 5: Solve for x
   x = 140,881,535,930.16/428,970.28
6. Step 6: Final answer
   x = 328,417.94