Finding the Fourth Proportional to 43,145,108.10, 64,717,662.15 and 12,439,628.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,145,108.10 : 64,717,662.15 = 12,439,628.10 : x
2. Step 2: Convert to fraction form
   43,145,108.10/64,717,662.15 = 12,439,628.10/x
3. Step 3: Cross multiply
   43,145,108.10x = 64,717,662.15 × 12,439,628.10
4. Step 4: Simplify right side
   43,145,108.10x = 805,063,648,647,446.38
5. Step 5: Solve for x
   x = 805,063,648,647,446.38/43,145,108.10
6. Step 6: Final answer
   x = 18,659,442.15