Finding the Fourth Proportional to 12,407.72, 18,607.61 and 4,085.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.72 : 18,607.61 = 4,085.81 : x
2. Step 2: Convert to fraction form
   12,407.72/18,607.61 = 4,085.81/x
3. Step 3: Cross multiply
   12,407.72x = 18,607.61 × 4,085.81
4. Step 4: Simplify right side
   12,407.72x = 76,027,159.01
5. Step 5: Solve for x
   x = 76,027,159.01/12,407.72
6. Step 6: Final answer
   x = 6,127.41