Finding the Fourth Proportional to 13,991.73, 19,308.56 and 7,618.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,991.73 : 19,308.56 = 7,618.22 : x
2. Step 2: Convert to fraction form
   13,991.73/19,308.56 = 7,618.22/x
3. Step 3: Cross multiply
   13,991.73x = 19,308.56 × 7,618.22
4. Step 4: Simplify right side
   13,991.73x = 147,096,857.96
5. Step 5: Solve for x
   x = 147,096,857.96/13,991.73
6. Step 6: Final answer
   x = 10,513.13