Finding the Fourth Proportional to 12,775.58, 17,631.35 and 7,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,775.58 : 17,631.35 = 7,111.42 : x
2. Step 2: Convert to fraction form
   12,775.58/17,631.35 = 7,111.42/x
3. Step 3: Cross multiply
   12,775.58x = 17,631.35 × 7,111.42
4. Step 4: Simplify right side
   12,775.58x = 125,383,935.02
5. Step 5: Solve for x
   x = 125,383,935.02/12,775.58
6. Step 6: Final answer
   x = 9,814.34