Finding the Fourth Proportional to 2,655.18, 3,666.87 and 1,990.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,655.18 : 3,666.87 = 1,990.98 : x
2. Step 2: Convert to fraction form
   2,655.18/3,666.87 = 1,990.98/x
3. Step 3: Cross multiply
   2,655.18x = 3,666.87 × 1,990.98
4. Step 4: Simplify right side
   2,655.18x = 7,300,664.83
5. Step 5: Solve for x
   x = 7,300,664.83/2,655.18
6. Step 6: Final answer
   x = 2,749.59