Finding the Fourth Proportional to 13,967.83, 19,275.60 and 7,680.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,967.83 : 19,275.60 = 7,680.21 : x
2. Step 2: Convert to fraction form
   13,967.83/19,275.60 = 7,680.21/x
3. Step 3: Cross multiply
   13,967.83x = 19,275.60 × 7,680.21
4. Step 4: Simplify right side
   13,967.83x = 148,040,655.88
5. Step 5: Solve for x
   x = 148,040,655.88/13,967.83
6. Step 6: Final answer
   x = 10,598.69