Finding the Fourth Proportional to 9,991.68, 13,788.72 and 5,800.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.68 : 13,788.72 = 5,800.32 : x
2. Step 2: Convert to fraction form
   9,991.68/13,788.72 = 5,800.32/x
3. Step 3: Cross multiply
   9,991.68x = 13,788.72 × 5,800.32
4. Step 4: Simplify right side
   9,991.68x = 79,978,988.39
5. Step 5: Solve for x
   x = 79,978,988.39/9,991.68
6. Step 6: Final answer
   x = 8,004.56