Finding the Fourth Proportional to 13,001.72, 19,499.16 and 4,680.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,001.72 : 19,499.16 = 4,680.18 : x
2. Step 2: Convert to fraction form
   13,001.72/19,499.16 = 4,680.18/x
3. Step 3: Cross multiply
   13,001.72x = 19,499.16 × 4,680.18
4. Step 4: Simplify right side
   13,001.72x = 91,259,556.71
5. Step 5: Solve for x
   x = 91,259,556.71/13,001.72
6. Step 6: Final answer
   x = 7,019.04