Finding the Fourth Proportional to 21,347,171.31, 29,456,835.94 and 12,054,178.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,347,171.31 : 29,456,835.94 = 12,054,178.09 : x
2. Step 2: Convert to fraction form
   21,347,171.31/29,456,835.94 = 12,054,178.09/x
3. Step 3: Cross multiply
   21,347,171.31x = 29,456,835.94 × 12,054,178.09
4. Step 4: Simplify right side
   21,347,171.31x = 355,077,946,388,672.56
5. Step 5: Solve for x
   x = 355,077,946,388,672.56/21,347,171.31
6. Step 6: Final answer
   x = 16,633,489.34