Finding the Fourth Proportional to 10,428.27, 14,390.94 and 5,648.11

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.27 : 14,390.94 = 5,648.11 : x
2. Step 2: Convert to fraction form
   10,428.27/14,390.94 = 5,648.11/x
3. Step 3: Cross multiply
   10,428.27x = 14,390.94 × 5,648.11
4. Step 4: Simplify right side
   10,428.27x = 81,281,612.12
5. Step 5: Solve for x
   x = 81,281,612.12/10,428.27
6. Step 6: Final answer
   x = 7,794.35