Finding the Fourth Proportional to 9,438.72, 13,030.43 and 5,903.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,438.72 : 13,030.43 = 5,903.07 : x
2. Step 2: Convert to fraction form
   9,438.72/13,030.43 = 5,903.07/x
3. Step 3: Cross multiply
   9,438.72x = 13,030.43 × 5,903.07
4. Step 4: Simplify right side
   9,438.72x = 76,919,540.42
5. Step 5: Solve for x
   x = 76,919,540.42/9,438.72
6. Step 6: Final answer
   x = 8,149.36