Finding the Fourth Proportional to 1,641.51, 2,457.39 and 990.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.51 : 2,457.39 = 990.27 : x
2. Step 2: Convert to fraction form
   1,641.51/2,457.39 = 990.27/x
3. Step 3: Cross multiply
   1,641.51x = 2,457.39 × 990.27
4. Step 4: Simplify right side
   1,641.51x = 2,433,479.60
5. Step 5: Solve for x
   x = 2,433,479.60/1,641.51
6. Step 6: Final answer
   x = 1,482.46