Finding the Fourth Proportional to 21,978,748.12, 30,328,640.82 and 12,189,012.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978,748.12 : 30,328,640.82 = 12,189,012.04 : x
2. Step 2: Convert to fraction form
   21,978,748.12/30,328,640.82 = 12,189,012.04/x
3. Step 3: Cross multiply
   21,978,748.12x = 30,328,640.82 × 12,189,012.04
4. Step 4: Simplify right side
   21,978,748.12x = 369,676,168,111,815.44
5. Step 5: Solve for x
   x = 369,676,168,111,815.44/21,978,748.12
6. Step 6: Final answer
   x = 16,819,709.93