Finding the Fourth Proportional to 13,060.71, 18,028.38 and 7,755.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,060.71 : 18,028.38 = 7,755.49 : x
2. Step 2: Convert to fraction form
   13,060.71/18,028.38 = 7,755.49/x
3. Step 3: Cross multiply
   13,060.71x = 18,028.38 × 7,755.49
4. Step 4: Simplify right side
   13,060.71x = 139,818,972.42
5. Step 5: Solve for x
   x = 139,818,972.42/13,060.71
6. Step 6: Final answer
   x = 10,705.31