Finding the Fourth Proportional to 9,377.86, 12,941.30 and 5,128.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.86 : 12,941.30 = 5,128.83 : x
2. Step 2: Convert to fraction form
   9,377.86/12,941.30 = 5,128.83/x
3. Step 3: Cross multiply
   9,377.86x = 12,941.30 × 5,128.83
4. Step 4: Simplify right side
   9,377.86x = 66,373,662.97
5. Step 5: Solve for x
   x = 66,373,662.97/9,377.86
6. Step 6: Final answer
   x = 7,077.70