Finding the Fourth Proportional to 21,866,013, 30,174,920.82 and 12,077,128.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,866,013 : 30,174,920.82 = 12,077,128.26 : x
2. Step 2: Convert to fraction form
   21,866,013/30,174,920.82 = 12,077,128.26/x
3. Step 3: Cross multiply
   21,866,013x = 30,174,920.82 × 12,077,128.26
4. Step 4: Simplify right side
   21,866,013x = 364,426,388,978,484.38
5. Step 5: Solve for x
   x = 364,426,388,978,484.38/21,866,013
6. Step 6: Final answer
   x = 16,666,339.17