Finding the Fourth Proportional to 13,991.99, 19,308.29 and 8,019.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,991.99 : 19,308.29 = 8,019.45 : x
2. Step 2: Convert to fraction form
   13,991.99/19,308.29 = 8,019.45/x
3. Step 3: Cross multiply
   13,991.99x = 19,308.29 × 8,019.45
4. Step 4: Simplify right side
   13,991.99x = 154,841,886.29
5. Step 5: Solve for x
   x = 154,841,886.29/13,991.99
6. Step 6: Final answer
   x = 11,066.47