Finding the Fourth Proportional to 13,906.79, 19,191.42 and 7,619.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,906.79 : 19,191.42 = 7,619.16 : x
2. Step 2: Convert to fraction form
   13,906.79/19,191.42 = 7,619.16/x
3. Step 3: Cross multiply
   13,906.79x = 19,191.42 × 7,619.16
4. Step 4: Simplify right side
   13,906.79x = 146,222,499.61
5. Step 5: Solve for x
   x = 146,222,499.61/13,906.79
6. Step 6: Final answer
   x = 10,514.47