Finding the Fourth Proportional to 10,556.15, 15,820.47 and 4,308.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,556.15 : 15,820.47 = 4,308.83 : x
2. Step 2: Convert to fraction form
   10,556.15/15,820.47 = 4,308.83/x
3. Step 3: Cross multiply
   10,556.15x = 15,820.47 × 4,308.83
4. Step 4: Simplify right side
   10,556.15x = 68,167,715.75
5. Step 5: Solve for x
   x = 68,167,715.75/10,556.15
6. Step 6: Final answer
   x = 6,457.63