Finding the Fourth Proportional to 1,065.31, 1,597.42 and 487.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.31 : 1,597.42 = 487.69 : x
2. Step 2: Convert to fraction form
   1,065.31/1,597.42 = 487.69/x
3. Step 3: Cross multiply
   1,065.31x = 1,597.42 × 487.69
4. Step 4: Simplify right side
   1,065.31x = 779,041.77
5. Step 5: Solve for x
   x = 779,041.77/1,065.31
6. Step 6: Final answer
   x = 731.28