Finding the Fourth Proportional to 5,871.99, 8,100.64 and 5,200.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,871.99 : 8,100.64 = 5,200.47 : x
2. Step 2: Convert to fraction form
   5,871.99/8,100.64 = 5,200.47/x
3. Step 3: Cross multiply
   5,871.99x = 8,100.64 × 5,200.47
4. Step 4: Simplify right side
   5,871.99x = 42,127,141.80
5. Step 5: Solve for x
   x = 42,127,141.80/5,871.99
6. Step 6: Final answer
   x = 7,174.25