Finding the Fourth Proportional to 9,392.86, 12,961.86 and 5,305

Step by Step Solution

1. Step 1: Write the proportion equation
   9,392.86 : 12,961.86 = 5,305 : x
2. Step 2: Convert to fraction form
   9,392.86/12,961.86 = 5,305/x
3. Step 3: Cross multiply
   9,392.86x = 12,961.86 × 5,305
4. Step 4: Simplify right side
   9,392.86x = 68,762,667.30
5. Step 5: Solve for x
   x = 68,762,667.30/9,392.86
6. Step 6: Final answer
   x = 7,320.74