Finding the Fourth Proportional to 13,419.06, 18,513.73 and 7,830.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.06 : 18,513.73 = 7,830.06 : x
2. Step 2: Convert to fraction form
   13,419.06/18,513.73 = 7,830.06/x
3. Step 3: Cross multiply
   13,419.06x = 18,513.73 × 7,830.06
4. Step 4: Simplify right side
   13,419.06x = 144,963,616.72
5. Step 5: Solve for x
   x = 144,963,616.72/13,419.06
6. Step 6: Final answer
   x = 10,802.81