Finding the Fourth Proportional to 9,377.32, 12,941.04 and 5,128.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.32 : 12,941.04 = 5,128.67 : x
2. Step 2: Convert to fraction form
   9,377.32/12,941.04 = 5,128.67/x
3. Step 3: Cross multiply
   9,377.32x = 12,941.04 × 5,128.67
4. Step 4: Simplify right side
   9,377.32x = 66,370,258.91
5. Step 5: Solve for x
   x = 66,370,258.91/9,377.32
6. Step 6: Final answer
   x = 7,077.75