Finding the Fourth Proportional to 9,928.05, 13,700.79 and 5,451.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928.05 : 13,700.79 = 5,451.86 : x
2. Step 2: Convert to fraction form
   9,928.05/13,700.79 = 5,451.86/x
3. Step 3: Cross multiply
   9,928.05x = 13,700.79 × 5,451.86
4. Step 4: Simplify right side
   9,928.05x = 74,694,720.47
5. Step 5: Solve for x
   x = 74,694,720.47/9,928.05
6. Step 6: Final answer
   x = 7,523.60