Finding the Fourth Proportional to 9,129.38, 13,690.72 and 4,447.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.38 : 13,690.72 = 4,447.98 : x
2. Step 2: Convert to fraction form
   9,129.38/13,690.72 = 4,447.98/x
3. Step 3: Cross multiply
   9,129.38x = 13,690.72 × 4,447.98
4. Step 4: Simplify right side
   9,129.38x = 60,896,048.75
5. Step 5: Solve for x
   x = 60,896,048.75/9,129.38
6. Step 6: Final answer
   x = 6,670.34