Finding the Fourth Proportional to 13,288.81, 19,900.41 and 8,343.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,288.81 : 19,900.41 = 8,343.49 : x
2. Step 2: Convert to fraction form
   13,288.81/19,900.41 = 8,343.49/x
3. Step 3: Cross multiply
   13,288.81x = 19,900.41 × 8,343.49
4. Step 4: Simplify right side
   13,288.81x = 166,038,871.83
5. Step 5: Solve for x
   x = 166,038,871.83/13,288.81
6. Step 6: Final answer
   x = 12,494.64