Finding the Fourth Proportional to 12,522.78, 18,774.86 and 7,591.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,522.78 : 18,774.86 = 7,591.23 : x
2. Step 2: Convert to fraction form
   12,522.78/18,774.86 = 7,591.23/x
3. Step 3: Cross multiply
   12,522.78x = 18,774.86 × 7,591.23
4. Step 4: Simplify right side
   12,522.78x = 142,524,242.52
5. Step 5: Solve for x
   x = 142,524,242.52/12,522.78
6. Step 6: Final answer
   x = 11,381.20