Finding the Fourth Proportional to 9,945.16, 14,889.90 and 5,317.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.16 : 14,889.90 = 5,317.96 : x
2. Step 2: Convert to fraction form
   9,945.16/14,889.90 = 5,317.96/x
3. Step 3: Cross multiply
   9,945.16x = 14,889.90 × 5,317.96
4. Step 4: Simplify right side
   9,945.16x = 79,183,892.60
5. Step 5: Solve for x
   x = 79,183,892.60/9,945.16
6. Step 6: Final answer
   x = 7,962.05