Finding the Fourth Proportional to 9,420.10, 14,056.69 and 9,355.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,420.10 : 14,056.69 = 9,355.30 : x
2. Step 2: Convert to fraction form
   9,420.10/14,056.69 = 9,355.30/x
3. Step 3: Cross multiply
   9,420.10x = 14,056.69 × 9,355.30
4. Step 4: Simplify right side
   9,420.10x = 131,504,551.96
5. Step 5: Solve for x
   x = 131,504,551.96/9,420.10
6. Step 6: Final answer
   x = 13,960.00