Finding the Fourth Proportional to 1,589.72, 2,385.72 and 603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,589.72 : 2,385.72 = 603.50 : x
2. Step 2: Convert to fraction form
   1,589.72/2,385.72 = 603.50/x
3. Step 3: Cross multiply
   1,589.72x = 2,385.72 × 603.50
4. Step 4: Simplify right side
   1,589.72x = 1,439,770.09
5. Step 5: Solve for x
   x = 1,439,770.09/1,589.72
6. Step 6: Final answer
   x = 905.68