Finding the Fourth Proportional to 21,388,709.76, 29,517,667.86 and 12,097,103.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,388,709.76 : 29,517,667.86 = 12,097,103.57 : x
2. Step 2: Convert to fraction form
   21,388,709.76/29,517,667.86 = 12,097,103.57/x
3. Step 3: Cross multiply
   21,388,709.76x = 29,517,667.86 × 12,097,103.57
4. Step 4: Simplify right side
   21,388,709.76x = 357,078,285,099,691.88
5. Step 5: Solve for x
   x = 357,078,285,099,691.88/21,388,709.76
6. Step 6: Final answer
   x = 16,694,708.99