Finding the Fourth Proportional to 10,716.56, 16,075.52 and 3,320.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,716.56 : 16,075.52 = 3,320.40 : x
2. Step 2: Convert to fraction form
   10,716.56/16,075.52 = 3,320.40/x
3. Step 3: Cross multiply
   10,716.56x = 16,075.52 × 3,320.40
4. Step 4: Simplify right side
   10,716.56x = 53,377,156.61
5. Step 5: Solve for x
   x = 53,377,156.61/10,716.56
6. Step 6: Final answer
   x = 4,980.81