Finding the Fourth Proportional to 13,343.30, 19,993.35 and 8,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,343.30 : 19,993.35 = 8,404.10 : x
2. Step 2: Convert to fraction form
   13,343.30/19,993.35 = 8,404.10/x
3. Step 3: Cross multiply
   13,343.30x = 19,993.35 × 8,404.10
4. Step 4: Simplify right side
   13,343.30x = 168,026,112.74
5. Step 5: Solve for x
   x = 168,026,112.74/13,343.30
6. Step 6: Final answer
   x = 12,592.55