Finding the Fourth Proportional to 12,820.17, 19,196.68 and 10,308

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.17 : 19,196.68 = 10,308 : x
2. Step 2: Convert to fraction form
   12,820.17/19,196.68 = 10,308/x
3. Step 3: Cross multiply
   12,820.17x = 19,196.68 × 10,308
4. Step 4: Simplify right side
   12,820.17x = 197,879,377.44
5. Step 5: Solve for x
   x = 197,879,377.44/12,820.17
6. Step 6: Final answer
   x = 15,435.00