Finding the Fourth Proportional to 12,906.96, 19,343.43 and 5,111.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.96 : 19,343.43 = 5,111.52 : x
2. Step 2: Convert to fraction form
   12,906.96/19,343.43 = 5,111.52/x
3. Step 3: Cross multiply
   12,906.96x = 19,343.43 × 5,111.52
4. Step 4: Simplify right side
   12,906.96x = 98,874,329.31
5. Step 5: Solve for x
   x = 98,874,329.31/12,906.96
6. Step 6: Final answer
   x = 7,660.54