Finding the Fourth Proportional to 5,381.63, 8,016.95 and 5,218.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381.63 : 8,016.95 = 5,218.42 : x
2. Step 2: Convert to fraction form
   5,381.63/8,016.95 = 5,218.42/x
3. Step 3: Cross multiply
   5,381.63x = 8,016.95 × 5,218.42
4. Step 4: Simplify right side
   5,381.63x = 41,835,812.22
5. Step 5: Solve for x
   x = 41,835,812.22/5,381.63
6. Step 6: Final answer
   x = 7,773.82