Finding the Fourth Proportional to 9,961.71, 14,928.59 and 7,872.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.71 : 14,928.59 = 7,872.53 : x
2. Step 2: Convert to fraction form
   9,961.71/14,928.59 = 7,872.53/x
3. Step 3: Cross multiply
   9,961.71x = 14,928.59 × 7,872.53
4. Step 4: Simplify right side
   9,961.71x = 117,525,658.63
5. Step 5: Solve for x
   x = 117,525,658.63/9,961.71
6. Step 6: Final answer
   x = 11,797.74