Finding the Fourth Proportional to 10,390.84, 14,318.76 and 7,401.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.84 : 14,318.76 = 7,401.40 : x
2. Step 2: Convert to fraction form
   10,390.84/14,318.76 = 7,401.40/x
3. Step 3: Cross multiply
   10,390.84x = 14,318.76 × 7,401.40
4. Step 4: Simplify right side
   10,390.84x = 105,978,870.26
5. Step 5: Solve for x
   x = 105,978,870.26/10,390.84
6. Step 6: Final answer
   x = 10,199.26