Finding the Fourth Proportional to 1,661.51, 2,291.42 and 998.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.51 : 2,291.42 = 998.12 : x
2. Step 2: Convert to fraction form
   1,661.51/2,291.42 = 998.12/x
3. Step 3: Cross multiply
   1,661.51x = 2,291.42 × 998.12
4. Step 4: Simplify right side
   1,661.51x = 2,287,100.67
5. Step 5: Solve for x
   x = 2,287,100.67/1,661.51
6. Step 6: Final answer
   x = 1,376.52