Finding the Fourth Proportional to 5,799.50, 7,999.71 and 5,090.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,799.50 : 7,999.71 = 5,090.78 : x
2. Step 2: Convert to fraction form
   5,799.50/7,999.71 = 5,090.78/x
3. Step 3: Cross multiply
   5,799.50x = 7,999.71 × 5,090.78
4. Step 4: Simplify right side
   5,799.50x = 40,724,793.22
5. Step 5: Solve for x
   x = 40,724,793.22/5,799.50
6. Step 6: Final answer
   x = 7,022.12