Finding the Fourth Proportional to 10,945.42, 16,420.72 and 3,549.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,945.42 : 16,420.72 = 3,549.88 : x
2. Step 2: Convert to fraction form
   10,945.42/16,420.72 = 3,549.88/x
3. Step 3: Cross multiply
   10,945.42x = 16,420.72 × 3,549.88
4. Step 4: Simplify right side
   10,945.42x = 58,291,585.51
5. Step 5: Solve for x
   x = 58,291,585.51/10,945.42
6. Step 6: Final answer
   x = 5,325.66