Finding the Fourth Proportional to 13,906.98, 19,191.38 and 7,619.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.98 : 19,191.38 = 7,619.31 : x
2. Step 2: Convert to fraction form
   13,906.98/19,191.38 = 7,619.31/x
3. Step 3: Cross multiply
   13,906.98x = 19,191.38 × 7,619.31
4. Step 4: Simplify right side
   13,906.98x = 146,225,035.45
5. Step 5: Solve for x
   x = 146,225,035.45/13,906.98
6. Step 6: Final answer
   x = 10,514.51