Finding the Fourth Proportional to 10,219.04, 15,320.76 and 5,285.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,219.04 : 15,320.76 = 5,285.56 : x
2. Step 2: Convert to fraction form
   10,219.04/15,320.76 = 5,285.56/x
3. Step 3: Cross multiply
   10,219.04x = 15,320.76 × 5,285.56
4. Step 4: Simplify right side
   10,219.04x = 80,978,796.23
5. Step 5: Solve for x
   x = 80,978,796.23/10,219.04
6. Step 6: Final answer
   x = 7,924.31