Finding the Fourth Proportional to 3,549.90, 5,320.53 and 3,109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,549.90 : 5,320.53 = 3,109.98 : x
2. Step 2: Convert to fraction form
   3,549.90/5,320.53 = 3,109.98/x
3. Step 3: Cross multiply
   3,549.90x = 5,320.53 × 3,109.98
4. Step 4: Simplify right side
   3,549.90x = 16,546,741.89
5. Step 5: Solve for x
   x = 16,546,741.89/3,549.90
6. Step 6: Final answer
   x = 4,661.19