Finding the Fourth Proportional to 13,482.78, 18,603.24 and 7,818.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,482.78 : 18,603.24 = 7,818.45 : x
2. Step 2: Convert to fraction form
   13,482.78/18,603.24 = 7,818.45/x
3. Step 3: Cross multiply
   13,482.78x = 18,603.24 × 7,818.45
4. Step 4: Simplify right side
   13,482.78x = 145,448,501.78
5. Step 5: Solve for x
   x = 145,448,501.78/13,482.78
6. Step 6: Final answer
   x = 10,787.72