Finding the Fourth Proportional to 12,261.95, 18,389.48 and 3,494.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,261.95 : 18,389.48 = 3,494.51 : x
2. Step 2: Convert to fraction form
   12,261.95/18,389.48 = 3,494.51/x
3. Step 3: Cross multiply
   12,261.95x = 18,389.48 × 3,494.51
4. Step 4: Simplify right side
   12,261.95x = 64,262,112.33
5. Step 5: Solve for x
   x = 64,262,112.33/12,261.95
6. Step 6: Final answer
   x = 5,240.78