Finding the Fourth Proportional to 13,077.91, 18,047.86 and 7,109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.91 : 18,047.86 = 7,109.98 : x
2. Step 2: Convert to fraction form
   13,077.91/18,047.86 = 7,109.98/x
3. Step 3: Cross multiply
   13,077.91x = 18,047.86 × 7,109.98
4. Step 4: Simplify right side
   13,077.91x = 128,319,986.54
5. Step 5: Solve for x
   x = 128,319,986.54/13,077.91
6. Step 6: Final answer
   x = 9,811.97