Finding the Fourth Proportional to 28,101.31, 42,139.64 and 10,558.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,101.31 : 42,139.64 = 10,558.82 : x
2. Step 2: Convert to fraction form
   28,101.31/42,139.64 = 10,558.82/x
3. Step 3: Cross multiply
   28,101.31x = 42,139.64 × 10,558.82
4. Step 4: Simplify right side
   28,101.31x = 444,945,005.37
5. Step 5: Solve for x
   x = 444,945,005.37/28,101.31
6. Step 6: Final answer
   x = 15,833.61