Finding the Fourth Proportional to 13,018.42, 19,448.48 and 8,300.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.42 : 19,448.48 = 8,300.83 : x
2. Step 2: Convert to fraction form
   13,018.42/19,448.48 = 8,300.83/x
3. Step 3: Cross multiply
   13,018.42x = 19,448.48 × 8,300.83
4. Step 4: Simplify right side
   13,018.42x = 161,438,526.24
5. Step 5: Solve for x
   x = 161,438,526.24/13,018.42
6. Step 6: Final answer
   x = 12,400.78