Finding the Fourth Proportional to 9,856.82, 13,602.46 and 5,380.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.82 : 13,602.46 = 5,380.68 : x
2. Step 2: Convert to fraction form
   9,856.82/13,602.46 = 5,380.68/x
3. Step 3: Cross multiply
   9,856.82x = 13,602.46 × 5,380.68
4. Step 4: Simplify right side
   9,856.82x = 73,190,484.47
5. Step 5: Solve for x
   x = 73,190,484.47/9,856.82
6. Step 6: Final answer
   x = 7,425.36