Finding the Fourth Proportional to 13,907.38, 19,194.45 and 7,939.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,907.38 : 19,194.45 = 7,939.30 : x
2. Step 2: Convert to fraction form
   13,907.38/19,194.45 = 7,939.30/x
3. Step 3: Cross multiply
   13,907.38x = 19,194.45 × 7,939.30
4. Step 4: Simplify right side
   13,907.38x = 152,390,496.89
5. Step 5: Solve for x
   x = 152,390,496.89/13,907.38
6. Step 6: Final answer
   x = 10,957.53