Finding the Fourth Proportional to 13,016.60, 17,971.59 and 8,773.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.60 : 17,971.59 = 8,773.98 : x
2. Step 2: Convert to fraction form
   13,016.60/17,971.59 = 8,773.98/x
3. Step 3: Cross multiply
   13,016.60x = 17,971.59 × 8,773.98
4. Step 4: Simplify right side
   13,016.60x = 157,682,371.23
5. Step 5: Solve for x
   x = 157,682,371.23/13,016.60
6. Step 6: Final answer
   x = 12,113.95