Finding the Fourth Proportional to 13,435.82, 18,541.54 and 7,770.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,435.82 : 18,541.54 = 7,770.56 : x
2. Step 2: Convert to fraction form
   13,435.82/18,541.54 = 7,770.56/x
3. Step 3: Cross multiply
   13,435.82x = 18,541.54 × 7,770.56
4. Step 4: Simplify right side
   13,435.82x = 144,078,149.06
5. Step 5: Solve for x
   x = 144,078,149.06/13,435.82
6. Step 6: Final answer
   x = 10,723.44