Finding the Fourth Proportional to 18,405,128.76, 25,400,214.05 and 10,145,172.42

Step by Step Solution

1. Step 1: Write the proportion equation
   18,405,128.76 : 25,400,214.05 = 10,145,172.42 : x
2. Step 2: Convert to fraction form
   18,405,128.76/25,400,214.05 = 10,145,172.42/x
3. Step 3: Cross multiply
   18,405,128.76x = 25,400,214.05 × 10,145,172.42
4. Step 4: Simplify right side
   18,405,128.76x = 257,689,550,864,429.56
5. Step 5: Solve for x
   x = 257,689,550,864,429.56/18,405,128.76
6. Step 6: Final answer
   x = 14,000,964.31