Finding the Fourth Proportional to 9,036.78, 12,470.22 and 5,681.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,036.78 : 12,470.22 = 5,681.40 : x
2. Step 2: Convert to fraction form
   9,036.78/12,470.22 = 5,681.40/x
3. Step 3: Cross multiply
   9,036.78x = 12,470.22 × 5,681.40
4. Step 4: Simplify right side
   9,036.78x = 70,848,307.91
5. Step 5: Solve for x
   x = 70,848,307.91/9,036.78
6. Step 6: Final answer
   x = 7,839.99