Finding the Fourth Proportional to 5,377.23, 8,000.78 and 5,243.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,377.23 : 8,000.78 = 5,243.31 : x
2. Step 2: Convert to fraction form
   5,377.23/8,000.78 = 5,243.31/x
3. Step 3: Cross multiply
   5,377.23x = 8,000.78 × 5,243.31
4. Step 4: Simplify right side
   5,377.23x = 41,950,543.57
5. Step 5: Solve for x
   x = 41,950,543.57/5,377.23
6. Step 6: Final answer
   x = 7,801.52