Finding the Fourth Proportional to 13,074.31, 18,042.65 and 7,105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,074.31 : 18,042.65 = 7,105.98 : x
2. Step 2: Convert to fraction form
   13,074.31/18,042.65 = 7,105.98/x
3. Step 3: Cross multiply
   13,074.31x = 18,042.65 × 7,105.98
4. Step 4: Simplify right side
   13,074.31x = 128,210,727.81
5. Step 5: Solve for x
   x = 128,210,727.81/13,074.31
6. Step 6: Final answer
   x = 9,806.31