Finding the Fourth Proportional to 13,378.78, 18,462.88 and 7,410.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,378.78 : 18,462.88 = 7,410.56 : x
2. Step 2: Convert to fraction form
   13,378.78/18,462.88 = 7,410.56/x
3. Step 3: Cross multiply
   13,378.78x = 18,462.88 × 7,410.56
4. Step 4: Simplify right side
   13,378.78x = 136,820,280.01
5. Step 5: Solve for x
   x = 136,820,280.01/13,378.78
6. Step 6: Final answer
   x = 10,226.66