Finding the Fourth Proportional to 13,051.27, 18,019.43 and 7,747.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,051.27 : 18,019.43 = 7,747.79 : x
2. Step 2: Convert to fraction form
   13,051.27/18,019.43 = 7,747.79/x
3. Step 3: Cross multiply
   13,051.27x = 18,019.43 × 7,747.79
4. Step 4: Simplify right side
   13,051.27x = 139,610,720.82
5. Step 5: Solve for x
   x = 139,610,720.82/13,051.27
6. Step 6: Final answer
   x = 10,697.10