Finding the Fourth Proportional to 13,077.48, 18,046.80 and 7,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.48 : 18,046.80 = 7,109.31 : x
2. Step 2: Convert to fraction form
   13,077.48/18,046.80 = 7,109.31/x
3. Step 3: Cross multiply
   13,077.48x = 18,046.80 × 7,109.31
4. Step 4: Simplify right side
   13,077.48x = 128,300,295.71
5. Step 5: Solve for x
   x = 128,300,295.71/13,077.48
6. Step 6: Final answer
   x = 9,810.78