Finding the Fourth Proportional to 13,906.49, 19,188.08 and 7,940.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.49 : 19,188.08 = 7,940.10 : x
2. Step 2: Convert to fraction form
   13,906.49/19,188.08 = 7,940.10/x
3. Step 3: Cross multiply
   13,906.49x = 19,188.08 × 7,940.10
4. Step 4: Simplify right side
   13,906.49x = 152,355,274.01
5. Step 5: Solve for x
   x = 152,355,274.01/13,906.49
6. Step 6: Final answer
   x = 10,955.70