Finding the Fourth Proportional to 28,789.32, 43,196.55 and 10,082.79

Step by Step Solution

1. Step 1: Write the proportion equation
   28,789.32 : 43,196.55 = 10,082.79 : x
2. Step 2: Convert to fraction form
   28,789.32/43,196.55 = 10,082.79/x
3. Step 3: Cross multiply
   28,789.32x = 43,196.55 × 10,082.79
4. Step 4: Simplify right side
   28,789.32x = 435,541,742.37
5. Step 5: Solve for x
   x = 435,541,742.37/28,789.32
6. Step 6: Final answer
   x = 15,128.59