Finding the Fourth Proportional to 21,603.12, 29,812.16 and 12,043.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,603.12 : 29,812.16 = 12,043.10 : x
2. Step 2: Convert to fraction form
   21,603.12/29,812.16 = 12,043.10/x
3. Step 3: Cross multiply
   21,603.12x = 29,812.16 × 12,043.10
4. Step 4: Simplify right side
   21,603.12x = 359,030,614.82
5. Step 5: Solve for x
   x = 359,030,614.82/21,603.12
6. Step 6: Final answer
   x = 16,619.39