Finding the Fourth Proportional to 12,938.84, 17,855.58 and 7,349.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,938.84 : 17,855.58 = 7,349.72 : x
2. Step 2: Convert to fraction form
   12,938.84/17,855.58 = 7,349.72/x
3. Step 3: Cross multiply
   12,938.84x = 17,855.58 × 7,349.72
4. Step 4: Simplify right side
   12,938.84x = 131,233,513.44
5. Step 5: Solve for x
   x = 131,233,513.44/12,938.84
6. Step 6: Final answer
   x = 10,142.60