Finding the Fourth Proportional to 9,622.26, 13,278.33 and 5,430.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,622.26 : 13,278.33 = 5,430.78 : x
2. Step 2: Convert to fraction form
   9,622.26/13,278.33 = 5,430.78/x
3. Step 3: Cross multiply
   9,622.26x = 13,278.33 × 5,430.78
4. Step 4: Simplify right side
   9,622.26x = 72,111,689.00
5. Step 5: Solve for x
   x = 72,111,689.00/9,622.26
6. Step 6: Final answer
   x = 7,494.26