Finding the Fourth Proportional to 9,293.69, 12,807.59 and 9,122.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,293.69 : 12,807.59 = 9,122.90 : x
2. Step 2: Convert to fraction form
   9,293.69/12,807.59 = 9,122.90/x
3. Step 3: Cross multiply
   9,293.69x = 12,807.59 × 9,122.90
4. Step 4: Simplify right side
   9,293.69x = 116,842,253.16
5. Step 5: Solve for x
   x = 116,842,253.16/9,293.69
6. Step 6: Final answer
   x = 12,572.21