Finding the Fourth Proportional to 5,290.93, 7,967.31 and 3,913.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.93 : 7,967.31 = 3,913.98 : x
2. Step 2: Convert to fraction form
   5,290.93/7,967.31 = 3,913.98/x
3. Step 3: Cross multiply
   5,290.93x = 7,967.31 × 3,913.98
4. Step 4: Simplify right side
   5,290.93x = 31,183,901.78
5. Step 5: Solve for x
   x = 31,183,901.78/5,290.93
6. Step 6: Final answer
   x = 5,893.84