Finding the Fourth Proportional to 12,706.68, 19,053.52 and 5,309.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,706.68 : 19,053.52 = 5,309.12 : x
2. Step 2: Convert to fraction form
   12,706.68/19,053.52 = 5,309.12/x
3. Step 3: Cross multiply
   12,706.68x = 19,053.52 × 5,309.12
4. Step 4: Simplify right side
   12,706.68x = 101,157,424.10
5. Step 5: Solve for x
   x = 101,157,424.10/12,706.68
6. Step 6: Final answer
   x = 7,960.96