Finding the Fourth Proportional to 13,078.01, 18,046.89 and 7,109.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.01 : 18,046.89 = 7,109.63 : x
2. Step 2: Convert to fraction form
   13,078.01/18,046.89 = 7,109.63/x
3. Step 3: Cross multiply
   13,078.01x = 18,046.89 × 7,109.63
4. Step 4: Simplify right side
   13,078.01x = 128,306,733.37
5. Step 5: Solve for x
   x = 128,306,733.37/13,078.01
6. Step 6: Final answer
   x = 9,810.87