Finding the Fourth Proportional to 12,789.43, 19,186.17 and 5,396.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.43 : 19,186.17 = 5,396.02 : x
2. Step 2: Convert to fraction form
   12,789.43/19,186.17 = 5,396.02/x
3. Step 3: Cross multiply
   12,789.43x = 19,186.17 × 5,396.02
4. Step 4: Simplify right side
   12,789.43x = 103,528,957.04
5. Step 5: Solve for x
   x = 103,528,957.04/12,789.43
6. Step 6: Final answer
   x = 8,094.88