Finding the Fourth Proportional to 9,945.90, 13,723.29 and 5,697.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.90 : 13,723.29 = 5,697.18 : x
2. Step 2: Convert to fraction form
   9,945.90/13,723.29 = 5,697.18/x
3. Step 3: Cross multiply
   9,945.90x = 13,723.29 × 5,697.18
4. Step 4: Simplify right side
   9,945.90x = 78,184,053.32
5. Step 5: Solve for x
   x = 78,184,053.32/9,945.90
6. Step 6: Final answer
   x = 7,860.93