Finding the Fourth Proportional to 12,275.56, 18,412.88 and 3,955.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,275.56 : 18,412.88 = 3,955.62 : x
2. Step 2: Convert to fraction form
   12,275.56/18,412.88 = 3,955.62/x
3. Step 3: Cross multiply
   12,275.56x = 18,412.88 × 3,955.62
4. Step 4: Simplify right side
   12,275.56x = 72,834,356.39
5. Step 5: Solve for x
   x = 72,834,356.39/12,275.56
6. Step 6: Final answer
   x = 5,933.28