Finding the Fourth Proportional to 19,947.31, 29,917.72 and 9,417.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,947.31 : 29,917.72 = 9,417.31 : x
2. Step 2: Convert to fraction form
   19,947.31/29,917.72 = 9,417.31/x
3. Step 3: Cross multiply
   19,947.31x = 29,917.72 × 9,417.31
4. Step 4: Simplify right side
   19,947.31x = 281,744,345.40
5. Step 5: Solve for x
   x = 281,744,345.40/19,947.31
6. Step 6: Final answer
   x = 14,124.43