Finding the Fourth Proportional to 13,909.03, 19,194.15 and 7,940.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,909.03 : 19,194.15 = 7,940.56 : x
2. Step 2: Convert to fraction form
   13,909.03/19,194.15 = 7,940.56/x
3. Step 3: Cross multiply
   13,909.03x = 19,194.15 × 7,940.56
4. Step 4: Simplify right side
   13,909.03x = 152,412,299.72
5. Step 5: Solve for x
   x = 152,412,299.72/13,909.03
6. Step 6: Final answer
   x = 10,957.80