Finding the Fourth Proportional to 9,389.62, 12,956.41 and 5,611.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.62 : 12,956.41 = 5,611.98 : x
2. Step 2: Convert to fraction form
   9,389.62/12,956.41 = 5,611.98/x
3. Step 3: Cross multiply
   9,389.62x = 12,956.41 × 5,611.98
4. Step 4: Simplify right side
   9,389.62x = 72,711,137.83
5. Step 5: Solve for x
   x = 72,711,137.83/9,389.62
6. Step 6: Final answer
   x = 7,743.78