Finding the Fourth Proportional to 11,810.55, 17,718.72 and 3,490.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,810.55 : 17,718.72 = 3,490.53 : x
2. Step 2: Convert to fraction form
   11,810.55/17,718.72 = 3,490.53/x
3. Step 3: Cross multiply
   11,810.55x = 17,718.72 × 3,490.53
4. Step 4: Simplify right side
   11,810.55x = 61,847,723.72
5. Step 5: Solve for x
   x = 61,847,723.72/11,810.55
6. Step 6: Final answer
   x = 5,236.65