Finding the Fourth Proportional to 9,901.59, 13,664.28 and 5,709.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.59 : 13,664.28 = 5,709.84 : x
2. Step 2: Convert to fraction form
   9,901.59/13,664.28 = 5,709.84/x
3. Step 3: Cross multiply
   9,901.59x = 13,664.28 × 5,709.84
4. Step 4: Simplify right side
   9,901.59x = 78,020,852.52
5. Step 5: Solve for x
   x = 78,020,852.52/9,901.59
6. Step 6: Final answer
   x = 7,879.63