Finding the Fourth Proportional to 1,072.89, 1,607.49 and 524.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.89 : 1,607.49 = 524.31 : x
2. Step 2: Convert to fraction form
   1,072.89/1,607.49 = 524.31/x
3. Step 3: Cross multiply
   1,072.89x = 1,607.49 × 524.31
4. Step 4: Simplify right side
   1,072.89x = 842,823.08
5. Step 5: Solve for x
   x = 842,823.08/1,072.89
6. Step 6: Final answer
   x = 785.56