Finding the Fourth Proportional to 3,588.38, 5,382.59 and 991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,588.38 : 5,382.59 = 991.34 : x
2. Step 2: Convert to fraction form
   3,588.38/5,382.59 = 991.34/x
3. Step 3: Cross multiply
   3,588.38x = 5,382.59 × 991.34
4. Step 4: Simplify right side
   3,588.38x = 5,335,944.90
5. Step 5: Solve for x
   x = 5,335,944.90/3,588.38
6. Step 6: Final answer
   x = 1,487.01