Finding the Fourth Proportional to 13,991.67, 19,308.17 and 7,618.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,991.67 : 19,308.17 = 7,618.14 : x
2. Step 2: Convert to fraction form
   13,991.67/19,308.17 = 7,618.14/x
3. Step 3: Cross multiply
   13,991.67x = 19,308.17 × 7,618.14
4. Step 4: Simplify right side
   13,991.67x = 147,092,361.25
5. Step 5: Solve for x
   x = 147,092,361.25/13,991.67
6. Step 6: Final answer
   x = 10,512.85