Finding the Fourth Proportional to 12,423,909.72, 17,106,970.72 and 12,388,037.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423,909.72 : 17,106,970.72 = 12,388,037.44 : x
2. Step 2: Convert to fraction form
   12,423,909.72/17,106,970.72 = 12,388,037.44/x
3. Step 3: Cross multiply
   12,423,909.72x = 17,106,970.72 × 12,388,037.44
4. Step 4: Simplify right side
   12,423,909.72x = 211,921,793,764,343.72
5. Step 5: Solve for x
   x = 211,921,793,764,343.72/12,423,909.72
6. Step 6: Final answer
   x = 17,057,576.76