Finding the Fourth Proportional to 3,669.31, 5,063.65 and 1,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.31 : 5,063.65 = 1,990.72 : x
2. Step 2: Convert to fraction form
   3,669.31/5,063.65 = 1,990.72/x
3. Step 3: Cross multiply
   3,669.31x = 5,063.65 × 1,990.72
4. Step 4: Simplify right side
   3,669.31x = 10,080,309.33
5. Step 5: Solve for x
   x = 10,080,309.33/3,669.31
6. Step 6: Final answer
   x = 2,747.19