Finding the Fourth Proportional to 9,205.71, 12,705.13 and 5,429.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,205.71 : 12,705.13 = 5,429.94 : x
2. Step 2: Convert to fraction form
   9,205.71/12,705.13 = 5,429.94/x
3. Step 3: Cross multiply
   9,205.71x = 12,705.13 × 5,429.94
4. Step 4: Simplify right side
   9,205.71x = 68,988,093.59
5. Step 5: Solve for x
   x = 68,988,093.59/9,205.71
6. Step 6: Final answer
   x = 7,494.05