Finding the Fourth Proportional to 9,619.25, 14,428.72 and 7,972.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.25 : 14,428.72 = 7,972.31 : x
2. Step 2: Convert to fraction form
   9,619.25/14,428.72 = 7,972.31/x
3. Step 3: Cross multiply
   9,619.25x = 14,428.72 × 7,972.31
4. Step 4: Simplify right side
   9,619.25x = 115,030,244.88
5. Step 5: Solve for x
   x = 115,030,244.88/9,619.25
6. Step 6: Final answer
   x = 11,958.34