Finding the Fourth Proportional to 13,978.24, 19,290.32 and 7,691.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.24 : 19,290.32 = 7,691.04 : x
2. Step 2: Convert to fraction form
   13,978.24/19,290.32 = 7,691.04/x
3. Step 3: Cross multiply
   13,978.24x = 19,290.32 × 7,691.04
4. Step 4: Simplify right side
   13,978.24x = 148,362,622.73
5. Step 5: Solve for x
   x = 148,362,622.73/13,978.24
6. Step 6: Final answer
   x = 10,613.83