Finding the Fourth Proportional to 13,196.71, 19,792.59 and 6,621.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.71 : 19,792.59 = 6,621.13 : x
2. Step 2: Convert to fraction form
   13,196.71/19,792.59 = 6,621.13/x
3. Step 3: Cross multiply
   13,196.71x = 19,792.59 × 6,621.13
4. Step 4: Simplify right side
   13,196.71x = 131,049,311.43
5. Step 5: Solve for x
   x = 131,049,311.43/13,196.71
6. Step 6: Final answer
   x = 9,930.45