Finding the Fourth Proportional to 12,405.12, 18,607.71 and 3,045.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,405.12 : 18,607.71 = 3,045.18 : x
2. Step 2: Convert to fraction form
   12,405.12/18,607.71 = 3,045.18/x
3. Step 3: Cross multiply
   12,405.12x = 18,607.71 × 3,045.18
4. Step 4: Simplify right side
   12,405.12x = 56,663,826.34
5. Step 5: Solve for x
   x = 56,663,826.34/12,405.12
6. Step 6: Final answer
   x = 4,567.78