Finding the Fourth Proportional to 9,377.76, 12,903.62 and 9,054.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.76 : 12,903.62 = 9,054.56 : x
2. Step 2: Convert to fraction form
   9,377.76/12,903.62 = 9,054.56/x
3. Step 3: Cross multiply
   9,377.76x = 12,903.62 × 9,054.56
4. Step 4: Simplify right side
   9,377.76x = 116,836,601.51
5. Step 5: Solve for x
   x = 116,836,601.51/9,377.76
6. Step 6: Final answer
   x = 12,458.90