Finding the Fourth Proportional to 13,261.20, 18,300.42 and 7,597.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,261.20 : 18,300.42 = 7,597.78 : x
2. Step 2: Convert to fraction form
   13,261.20/18,300.42 = 7,597.78/x
3. Step 3: Cross multiply
   13,261.20x = 18,300.42 × 7,597.78
4. Step 4: Simplify right side
   13,261.20x = 139,042,473.57
5. Step 5: Solve for x
   x = 139,042,473.57/13,261.20
6. Step 6: Final answer
   x = 10,484.91