Finding the Fourth Proportional to 13,145.60, 19,726.72 and 6,993.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.60 : 19,726.72 = 6,993.92 : x
2. Step 2: Convert to fraction form
   13,145.60/19,726.72 = 6,993.92/x
3. Step 3: Cross multiply
   13,145.60x = 19,726.72 × 6,993.92
4. Step 4: Simplify right side
   13,145.60x = 137,967,101.54
5. Step 5: Solve for x
   x = 137,967,101.54/13,145.60
6. Step 6: Final answer
   x = 10,495.31