Finding the Fourth Proportional to 9,772.86, 13,486.22 and 5,791.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,772.86 : 13,486.22 = 5,791.61 : x
2. Step 2: Convert to fraction form
   9,772.86/13,486.22 = 5,791.61/x
3. Step 3: Cross multiply
   9,772.86x = 13,486.22 × 5,791.61
4. Step 4: Simplify right side
   9,772.86x = 78,106,931.37
5. Step 5: Solve for x
   x = 78,106,931.37/9,772.86
6. Step 6: Final answer
   x = 7,992.23