Finding the Fourth Proportional to 9,111.95, 12,579.95 and 5,973.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.95 : 12,579.95 = 5,973.60 : x
2. Step 2: Convert to fraction form
   9,111.95/12,579.95 = 5,973.60/x
3. Step 3: Cross multiply
   9,111.95x = 12,579.95 × 5,973.60
4. Step 4: Simplify right side
   9,111.95x = 75,147,559.45
5. Step 5: Solve for x
   x = 75,147,559.45/9,111.95
6. Step 6: Final answer
   x = 8,247.15