Finding the Fourth Proportional to 13,100.42, 18,075.78 and 7,794.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.42 : 18,075.78 = 7,794.20 : x
2. Step 2: Convert to fraction form
   13,100.42/18,075.78 = 7,794.20/x
3. Step 3: Cross multiply
   13,100.42x = 18,075.78 × 7,794.20
4. Step 4: Simplify right side
   13,100.42x = 140,886,289.67
5. Step 5: Solve for x
   x = 140,886,289.67/13,100.42
6. Step 6: Final answer
   x = 10,754.33