Finding the Fourth Proportional to 13,096.56, 18,070.74 and 9,116.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.56 : 18,070.74 = 9,116.22 : x
2. Step 2: Convert to fraction form
   13,096.56/18,070.74 = 9,116.22/x
3. Step 3: Cross multiply
   13,096.56x = 18,070.74 × 9,116.22
4. Step 4: Simplify right side
   13,096.56x = 164,736,841.40
5. Step 5: Solve for x
   x = 164,736,841.40/13,096.56
6. Step 6: Final answer
   x = 12,578.63