Finding the Fourth Proportional to 10,815.12, 16,219.44 and 3,888

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.12 : 16,219.44 = 3,888 : x
2. Step 2: Convert to fraction form
   10,815.12/16,219.44 = 3,888/x
3. Step 3: Cross multiply
   10,815.12x = 16,219.44 × 3,888
4. Step 4: Simplify right side
   10,815.12x = 63,061,182.72
5. Step 5: Solve for x
   x = 63,061,182.72/10,815.12
6. Step 6: Final answer
   x = 5,830.84