Finding the Fourth Proportional to 9,368.44, 12,929.72 and 5,389.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.44 : 12,929.72 = 5,389.45 : x
2. Step 2: Convert to fraction form
   9,368.44/12,929.72 = 5,389.45/x
3. Step 3: Cross multiply
   9,368.44x = 12,929.72 × 5,389.45
4. Step 4: Simplify right side
   9,368.44x = 69,684,079.45
5. Step 5: Solve for x
   x = 69,684,079.45/9,368.44
6. Step 6: Final answer
   x = 7,438.17