Finding the Fourth Proportional to 2,665.47, 3,998.18 and 690.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.47 : 3,998.18 = 690.93 : x
2. Step 2: Convert to fraction form
   2,665.47/3,998.18 = 690.93/x
3. Step 3: Cross multiply
   2,665.47x = 3,998.18 × 690.93
4. Step 4: Simplify right side
   2,665.47x = 2,762,459.05
5. Step 5: Solve for x
   x = 2,762,459.05/2,665.47
6. Step 6: Final answer
   x = 1,036.39