Finding the Fourth Proportional to 21,458,431.81, 29,613,414.61 and 12,292,846.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,458,431.81 : 29,613,414.61 = 12,292,846.03 : x
2. Step 2: Convert to fraction form
   21,458,431.81/29,613,414.61 = 12,292,846.03/x
3. Step 3: Cross multiply
   21,458,431.81x = 29,613,414.61 × 12,292,846.03
4. Step 4: Simplify right side
   21,458,431.81x = 364,033,146,275,665.31
5. Step 5: Solve for x
   x = 364,033,146,275,665.31/21,458,431.81
6. Step 6: Final answer
   x = 16,964,573.62