Finding the Fourth Proportional to 13,909, 19,194.42 and 7,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,909 : 19,194.42 = 7,621.52 : x
2. Step 2: Convert to fraction form
   13,909/19,194.42 = 7,621.52/x
3. Step 3: Cross multiply
   13,909x = 19,194.42 × 7,621.52
4. Step 4: Simplify right side
   13,909x = 146,290,655.92
5. Step 5: Solve for x
   x = 146,290,655.92/13,909
6. Step 6: Final answer
   x = 10,517.70