Finding the Fourth Proportional to 9,992.56, 14,969.32 and 7,791

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.56 : 14,969.32 = 7,791 : x
2. Step 2: Convert to fraction form
   9,992.56/14,969.32 = 7,791/x
3. Step 3: Cross multiply
   9,992.56x = 14,969.32 × 7,791
4. Step 4: Simplify right side
   9,992.56x = 116,625,972.12
5. Step 5: Solve for x
   x = 116,625,972.12/9,992.56
6. Step 6: Final answer
   x = 11,671.28