Finding the Fourth Proportional to 9,928.17, 13,700.34 and 5,679.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928.17 : 13,700.34 = 5,679.32 : x
2. Step 2: Convert to fraction form
   9,928.17/13,700.34 = 5,679.32/x
3. Step 3: Cross multiply
   9,928.17x = 13,700.34 × 5,679.32
4. Step 4: Simplify right side
   9,928.17x = 77,808,546.47
5. Step 5: Solve for x
   x = 77,808,546.47/9,928.17
6. Step 6: Final answer
   x = 7,837.15