Finding the Fourth Proportional to 9,791.86, 13,512.72 and 5,315.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,791.86 : 13,512.72 = 5,315.58 : x
2. Step 2: Convert to fraction form
   9,791.86/13,512.72 = 5,315.58/x
3. Step 3: Cross multiply
   9,791.86x = 13,512.72 × 5,315.58
4. Step 4: Simplify right side
   9,791.86x = 71,827,944.18
5. Step 5: Solve for x
   x = 71,827,944.18/9,791.86
6. Step 6: Final answer
   x = 7,335.47