Finding the Fourth Proportional to 485,060.56, 727,585.72 and 189,570

Step by Step Solution

1. Step 1: Write the proportion equation
   485,060.56 : 727,585.72 = 189,570 : x
2. Step 2: Convert to fraction form
   485,060.56/727,585.72 = 189,570/x
3. Step 3: Cross multiply
   485,060.56x = 727,585.72 × 189,570
4. Step 4: Simplify right side
   485,060.56x = 137,928,424,940.40
5. Step 5: Solve for x
   x = 137,928,424,940.40/485,060.56
6. Step 6: Final answer
   x = 284,353.00