Finding the Fourth Proportional to 13,077.98, 18,047.61 and 7,109.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.98 : 18,047.61 = 7,109.63 : x
2. Step 2: Convert to fraction form
   13,077.98/18,047.61 = 7,109.63/x
3. Step 3: Cross multiply
   13,077.98x = 18,047.61 × 7,109.63
4. Step 4: Simplify right side
   13,077.98x = 128,311,829.48
5. Step 5: Solve for x
   x = 128,311,829.48/13,077.98
6. Step 6: Final answer
   x = 9,811.29