Finding the Fourth Proportional to 1,039.69, 1,561.16 and 993.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.69 : 1,561.16 = 993.52 : x
2. Step 2: Convert to fraction form
   1,039.69/1,561.16 = 993.52/x
3. Step 3: Cross multiply
   1,039.69x = 1,561.16 × 993.52
4. Step 4: Simplify right side
   1,039.69x = 1,551,043.68
5. Step 5: Solve for x
   x = 1,551,043.68/1,039.69
6. Step 6: Final answer
   x = 1,491.83