Finding the Fourth Proportional to 10,417.90, 14,361.72 and 7,428.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,417.90 : 14,361.72 = 7,428.54 : x
2. Step 2: Convert to fraction form
   10,417.90/14,361.72 = 7,428.54/x
3. Step 3: Cross multiply
   10,417.90x = 14,361.72 × 7,428.54
4. Step 4: Simplify right side
   10,417.90x = 106,686,611.49
5. Step 5: Solve for x
   x = 106,686,611.49/10,417.90
6. Step 6: Final answer
   x = 10,240.70