Finding the Fourth Proportional to 5,817.51, 7,975.82 and 5,712.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,817.51 : 7,975.82 = 5,712.21 : x
2. Step 2: Convert to fraction form
   5,817.51/7,975.82 = 5,712.21/x
3. Step 3: Cross multiply
   5,817.51x = 7,975.82 × 5,712.21
4. Step 4: Simplify right side
   5,817.51x = 45,559,573.04
5. Step 5: Solve for x
   x = 45,559,573.04/5,817.51
6. Step 6: Final answer
   x = 7,831.46