Finding the Fourth Proportional to 1,065.72, 1,599.31 and 372.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.72 : 1,599.31 = 372.39 : x
2. Step 2: Convert to fraction form
   1,065.72/1,599.31 = 372.39/x
3. Step 3: Cross multiply
   1,065.72x = 1,599.31 × 372.39
4. Step 4: Simplify right side
   1,065.72x = 595,561.52
5. Step 5: Solve for x
   x = 595,561.52/1,065.72
6. Step 6: Final answer
   x = 558.83