Finding the Fourth Proportional to 9,361.71, 12,920.42 and 9,054.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,361.71 : 12,920.42 = 9,054.02 : x
2. Step 2: Convert to fraction form
   9,361.71/12,920.42 = 9,054.02/x
3. Step 3: Cross multiply
   9,361.71x = 12,920.42 × 9,054.02
4. Step 4: Simplify right side
   9,361.71x = 116,981,631.22
5. Step 5: Solve for x
   x = 116,981,631.22/9,361.71
6. Step 6: Final answer
   x = 12,495.75