Finding the Fourth Proportional to 1,494.51, 2,062.72 and 990.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,494.51 : 2,062.72 = 990.38 : x
2. Step 2: Convert to fraction form
   1,494.51/2,062.72 = 990.38/x
3. Step 3: Cross multiply
   1,494.51x = 2,062.72 × 990.38
4. Step 4: Simplify right side
   1,494.51x = 2,042,876.63
5. Step 5: Solve for x
   x = 2,042,876.63/1,494.51
6. Step 6: Final answer
   x = 1,366.92