Finding the Fourth Proportional to 13,434.19, 18,539.82 and 7,769.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,434.19 : 18,539.82 = 7,769.18 : x
2. Step 2: Convert to fraction form
   13,434.19/18,539.82 = 7,769.18/x
3. Step 3: Cross multiply
   13,434.19x = 18,539.82 × 7,769.18
4. Step 4: Simplify right side
   13,434.19x = 144,039,245.10
5. Step 5: Solve for x
   x = 144,039,245.10/13,434.19
6. Step 6: Final answer
   x = 10,721.84