Finding the Fourth Proportional to 10,028.72, 13,845.90 and 6,445.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,028.72 : 13,845.90 = 6,445.10 : x
2. Step 2: Convert to fraction form
   10,028.72/13,845.90 = 6,445.10/x
3. Step 3: Cross multiply
   10,028.72x = 13,845.90 × 6,445.10
4. Step 4: Simplify right side
   10,028.72x = 89,238,210.09
5. Step 5: Solve for x
   x = 89,238,210.09/10,028.72
6. Step 6: Final answer
   x = 8,898.27