Finding the Fourth Proportional to 13,347.47, 18,420.89 and 7,682.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,347.47 : 18,420.89 = 7,682.43 : x
2. Step 2: Convert to fraction form
   13,347.47/18,420.89 = 7,682.43/x
3. Step 3: Cross multiply
   13,347.47x = 18,420.89 × 7,682.43
4. Step 4: Simplify right side
   13,347.47x = 141,517,228.63
5. Step 5: Solve for x
   x = 141,517,228.63/13,347.47
6. Step 6: Final answer
   x = 10,602.55