Finding the Fourth Proportional to 9,438.12, 12,971.34 and 7,338.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,438.12 : 12,971.34 = 7,338.60 : x
2. Step 2: Convert to fraction form
   9,438.12/12,971.34 = 7,338.60/x
3. Step 3: Cross multiply
   9,438.12x = 12,971.34 × 7,338.60
4. Step 4: Simplify right side
   9,438.12x = 95,191,475.72
5. Step 5: Solve for x
   x = 95,191,475.72/9,438.12
6. Step 6: Final answer
   x = 10,085.85