Finding the Fourth Proportional to 12,913.56, 17,849.16 and 9,401.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.56 : 17,849.16 = 9,401.40 : x
2. Step 2: Convert to fraction form
   12,913.56/17,849.16 = 9,401.40/x
3. Step 3: Cross multiply
   12,913.56x = 17,849.16 × 9,401.40
4. Step 4: Simplify right side
   12,913.56x = 167,807,092.82
5. Step 5: Solve for x
   x = 167,807,092.82/12,913.56
6. Step 6: Final answer
   x = 12,994.64