Finding the Fourth Proportional to 8,978.11, 12,389.25 and 5,201.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.11 : 12,389.25 = 5,201.03 : x
2. Step 2: Convert to fraction form
   8,978.11/12,389.25 = 5,201.03/x
3. Step 3: Cross multiply
   8,978.11x = 12,389.25 × 5,201.03
4. Step 4: Simplify right side
   8,978.11x = 64,436,772.98
5. Step 5: Solve for x
   x = 64,436,772.98/8,978.11
6. Step 6: Final answer
   x = 7,177.10