Finding the Fourth Proportional to 13,196.61, 19,790.01 and 4,429.44

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.61 : 19,790.01 = 4,429.44 : x
2. Step 2: Convert to fraction form
   13,196.61/19,790.01 = 4,429.44/x
3. Step 3: Cross multiply
   13,196.61x = 19,790.01 × 4,429.44
4. Step 4: Simplify right side
   13,196.61x = 87,658,661.89
5. Step 5: Solve for x
   x = 87,658,661.89/13,196.61
6. Step 6: Final answer
   x = 6,642.51