Finding the Fourth Proportional to 21,864,425.28, 30,172,390.56 and 12,074,674.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,864,425.28 : 30,172,390.56 = 12,074,674.56 : x
2. Step 2: Convert to fraction form
   21,864,425.28/30,172,390.56 = 12,074,674.56/x
3. Step 3: Cross multiply
   21,864,425.28x = 30,172,390.56 × 12,074,674.56
4. Step 4: Simplify right side
   21,864,425.28x = 364,321,796,709,216.12
5. Step 5: Solve for x
   x = 364,321,796,709,216.12/21,864,425.28
6. Step 6: Final answer
   x = 16,662,765.75