Finding the Fourth Proportional to 13,908.55, 19,193.74 and 7,940.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,908.55 : 19,193.74 = 7,940.09 : x
2. Step 2: Convert to fraction form
   13,908.55/19,193.74 = 7,940.09/x
3. Step 3: Cross multiply
   13,908.55x = 19,193.74 × 7,940.09
4. Step 4: Simplify right side
   13,908.55x = 152,400,083.96
5. Step 5: Solve for x
   x = 152,400,083.96/13,908.55
6. Step 6: Final answer
   x = 10,957.29