Finding the Fourth Proportional to 15,797.31, 21,807.27 and 9,426.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,797.31 : 21,807.27 = 9,426.12 : x
2. Step 2: Convert to fraction form
   15,797.31/21,807.27 = 9,426.12/x
3. Step 3: Cross multiply
   15,797.31x = 21,807.27 × 9,426.12
4. Step 4: Simplify right side
   15,797.31x = 205,557,943.89
5. Step 5: Solve for x
   x = 205,557,943.89/15,797.31
6. Step 6: Final answer
   x = 13,012.21