Finding the Fourth Proportional to 21,065.84, 29,061.83 and 12,111.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,065.84 : 29,061.83 = 12,111.45 : x
2. Step 2: Convert to fraction form
   21,065.84/29,061.83 = 12,111.45/x
3. Step 3: Cross multiply
   21,065.84x = 29,061.83 × 12,111.45
4. Step 4: Simplify right side
   21,065.84x = 351,980,840.40
5. Step 5: Solve for x
   x = 351,980,840.40/21,065.84
6. Step 6: Final answer
   x = 16,708.61