Finding the Fourth Proportional to 9,389.84, 12,955.43 and 5,611.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.84 : 12,955.43 = 5,611.32 : x
2. Step 2: Convert to fraction form
   9,389.84/12,955.43 = 5,611.32/x
3. Step 3: Cross multiply
   9,389.84x = 12,955.43 × 5,611.32
4. Step 4: Simplify right side
   9,389.84x = 72,697,063.47
5. Step 5: Solve for x
   x = 72,697,063.47/9,389.84
6. Step 6: Final answer
   x = 7,742.10