Finding the Fourth Proportional to 13,019.99, 17,973.80 and 8,242.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.99 : 17,973.80 = 8,242.25 : x
2. Step 2: Convert to fraction form
   13,019.99/17,973.80 = 8,242.25/x
3. Step 3: Cross multiply
   13,019.99x = 17,973.80 × 8,242.25
4. Step 4: Simplify right side
   13,019.99x = 148,144,421.97
5. Step 5: Solve for x
   x = 148,144,421.97/13,019.99
6. Step 6: Final answer
   x = 11,378.23