Finding the Fourth Proportional to 670,443.69, 1,005,662.97 and 271,079.67

Step by Step Solution

1. Step 1: Write the proportion equation
   670,443.69 : 1,005,662.97 = 271,079.67 : x
2. Step 2: Convert to fraction form
   670,443.69/1,005,662.97 = 271,079.67/x
3. Step 3: Cross multiply
   670,443.69x = 1,005,662.97 × 271,079.67
4. Step 4: Simplify right side
   670,443.69x = 272,614,786,038.82
5. Step 5: Solve for x
   x = 272,614,786,038.82/670,443.69
6. Step 6: Final answer
   x = 406,618.47