Finding the Fourth Proportional to 2,375.83, 3,561.82 and 990.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,375.83 : 3,561.82 = 990.21 : x
2. Step 2: Convert to fraction form
   2,375.83/3,561.82 = 990.21/x
3. Step 3: Cross multiply
   2,375.83x = 3,561.82 × 990.21
4. Step 4: Simplify right side
   2,375.83x = 3,526,937.66
5. Step 5: Solve for x
   x = 3,526,937.66/2,375.83
6. Step 6: Final answer
   x = 1,484.51