Finding the Fourth Proportional to 13,159.67, 19,693.33 and 10,790.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,159.67 : 19,693.33 = 10,790.42 : x
2. Step 2: Convert to fraction form
   13,159.67/19,693.33 = 10,790.42/x
3. Step 3: Cross multiply
   13,159.67x = 19,693.33 × 10,790.42
4. Step 4: Simplify right side
   13,159.67x = 212,499,176.46
5. Step 5: Solve for x
   x = 212,499,176.46/13,159.67
6. Step 6: Final answer
   x = 16,147.76