Finding the Fourth Proportional to 9,320.69, 12,867.30 and 7,191.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,320.69 : 12,867.30 = 7,191.45 : x
2. Step 2: Convert to fraction form
   9,320.69/12,867.30 = 7,191.45/x
3. Step 3: Cross multiply
   9,320.69x = 12,867.30 × 7,191.45
4. Step 4: Simplify right side
   9,320.69x = 92,534,544.59
5. Step 5: Solve for x
   x = 92,534,544.59/9,320.69
6. Step 6: Final answer
   x = 9,927.86