Finding the Fourth Proportional to 412,756.71, 569,616.72 and 231,485.40

Step by Step Solution

1. Step 1: Write the proportion equation
   412,756.71 : 569,616.72 = 231,485.40 : x
2. Step 2: Convert to fraction form
   412,756.71/569,616.72 = 231,485.40/x
3. Step 3: Cross multiply
   412,756.71x = 569,616.72 × 231,485.40
4. Step 4: Simplify right side
   412,756.71x = 131,857,954,275.89
5. Step 5: Solve for x
   x = 131,857,954,275.89/412,756.71
6. Step 6: Final answer
   x = 319,456.84