Finding the Fourth Proportional to 13,078.22, 18,047.83 and 7,109.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.22 : 18,047.83 = 7,109.87 : x
2. Step 2: Convert to fraction form
   13,078.22/18,047.83 = 7,109.87/x
3. Step 3: Cross multiply
   13,078.22x = 18,047.83 × 7,109.87
4. Step 4: Simplify right side
   13,078.22x = 128,317,689.53
5. Step 5: Solve for x
   x = 128,317,689.53/13,078.22
6. Step 6: Final answer
   x = 9,811.56