Finding the Fourth Proportional to 11,820.56, 16,312.15 and 6,443.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.56 : 16,312.15 = 6,443.04 : x
2. Step 2: Convert to fraction form
   11,820.56/16,312.15 = 6,443.04/x
3. Step 3: Cross multiply
   11,820.56x = 16,312.15 × 6,443.04
4. Step 4: Simplify right side
   11,820.56x = 105,099,876.98
5. Step 5: Solve for x
   x = 105,099,876.98/11,820.56
6. Step 6: Final answer
   x = 8,891.28