Finding the Fourth Proportional to 2,179.47, 3,007.77 and 1,235.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.47 : 3,007.77 = 1,235.30 : x
2. Step 2: Convert to fraction form
   2,179.47/3,007.77 = 1,235.30/x
3. Step 3: Cross multiply
   2,179.47x = 3,007.77 × 1,235.30
4. Step 4: Simplify right side
   2,179.47x = 3,715,505.95
5. Step 5: Solve for x
   x = 3,715,505.95/2,179.47
6. Step 6: Final answer
   x = 1,704.77