Finding the Fourth Proportional to 6,200.40, 9,288.72 and 5,991.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,200.40 : 9,288.72 = 5,991.96 : x
2. Step 2: Convert to fraction form
   6,200.40/9,288.72 = 5,991.96/x
3. Step 3: Cross multiply
   6,200.40x = 9,288.72 × 5,991.96
4. Step 4: Simplify right side
   6,200.40x = 55,657,638.69
5. Step 5: Solve for x
   x = 55,657,638.69/6,200.40
6. Step 6: Final answer
   x = 8,976.46