Finding the Fourth Proportional to 28,102.31, 42,141.14 and 10,559.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,102.31 : 42,141.14 = 10,559.82 : x
2. Step 2: Convert to fraction form
   28,102.31/42,141.14 = 10,559.82/x
3. Step 3: Cross multiply
   28,102.31x = 42,141.14 × 10,559.82
4. Step 4: Simplify right side
   28,102.31x = 445,002,852.99
5. Step 5: Solve for x
   x = 445,002,852.99/28,102.31
6. Step 6: Final answer
   x = 15,835.10