Finding the Fourth Proportional to 13,667,621.78, 18,861,711.72 and 7,556,443.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667,621.78 : 18,861,711.72 = 7,556,443.94 : x
2. Step 2: Convert to fraction form
   13,667,621.78/18,861,711.72 = 7,556,443.94/x
3. Step 3: Cross multiply
   13,667,621.78x = 18,861,711.72 × 7,556,443.94
4. Step 4: Simplify right side
   13,667,621.78x = 142,527,467,224,620.97
5. Step 5: Solve for x
   x = 142,527,467,224,620.97/13,667,621.78
6. Step 6: Final answer
   x = 10,428,110.28