Finding the Fourth Proportional to 13,077.86, 18,047.45 and 7,109.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.86 : 18,047.45 = 7,109.51 : x
2. Step 2: Convert to fraction form
   13,077.86/18,047.45 = 7,109.51/x
3. Step 3: Cross multiply
   13,077.86x = 18,047.45 × 7,109.51
4. Step 4: Simplify right side
   13,077.86x = 128,308,453.79
5. Step 5: Solve for x
   x = 128,308,453.79/13,077.86
6. Step 6: Final answer
   x = 9,811.12