Finding the Fourth Proportional to 12,720.06, 19,077.93 and 3,360.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.06 : 19,077.93 = 3,360.18 : x
2. Step 2: Convert to fraction form
   12,720.06/19,077.93 = 3,360.18/x
3. Step 3: Cross multiply
   12,720.06x = 19,077.93 × 3,360.18
4. Step 4: Simplify right side
   12,720.06x = 64,105,278.83
5. Step 5: Solve for x
   x = 64,105,278.83/12,720.06
6. Step 6: Final answer
   x = 5,039.70