Finding the Fourth Proportional to 9,972.70, 13,759.90 and 5,664.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,972.70 : 13,759.90 = 5,664.83 : x
2. Step 2: Convert to fraction form
   9,972.70/13,759.90 = 5,664.83/x
3. Step 3: Cross multiply
   9,972.70x = 13,759.90 × 5,664.83
4. Step 4: Simplify right side
   9,972.70x = 77,947,425.52
5. Step 5: Solve for x
   x = 77,947,425.52/9,972.70
6. Step 6: Final answer
   x = 7,816.08