Finding the Fourth Proportional to 1,990.35, 2,984.72 and 691.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.35 : 2,984.72 = 691.52 : x
2. Step 2: Convert to fraction form
   1,990.35/2,984.72 = 691.52/x
3. Step 3: Cross multiply
   1,990.35x = 2,984.72 × 691.52
4. Step 4: Simplify right side
   1,990.35x = 2,063,975.19
5. Step 5: Solve for x
   x = 2,063,975.19/1,990.35
6. Step 6: Final answer
   x = 1,036.99