Finding the Fourth Proportional to 13,856.31, 19,121.00 and 7,567.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,856.31 : 19,121.00 = 7,567.47 : x
2. Step 2: Convert to fraction form
   13,856.31/19,121.00 = 7,567.47/x
3. Step 3: Cross multiply
   13,856.31x = 19,121.00 × 7,567.47
4. Step 4: Simplify right side
   13,856.31x = 144,697,556.03
5. Step 5: Solve for x
   x = 144,697,556.03/13,856.31
6. Step 6: Final answer
   x = 10,442.72