Finding the Fourth Proportional to 1,084.05, 1,621.82 and 992.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.05 : 1,621.82 = 992.12 : x
2. Step 2: Convert to fraction form
   1,084.05/1,621.82 = 992.12/x
3. Step 3: Cross multiply
   1,084.05x = 1,621.82 × 992.12
4. Step 4: Simplify right side
   1,084.05x = 1,609,034.43
5. Step 5: Solve for x
   x = 1,609,034.43/1,084.05
6. Step 6: Final answer
   x = 1,484.28