Finding the Fourth Proportional to 1,669.71, 2,505.41 and 1,013.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.71 : 2,505.41 = 1,013.15 : x
2. Step 2: Convert to fraction form
   1,669.71/2,505.41 = 1,013.15/x
3. Step 3: Cross multiply
   1,669.71x = 2,505.41 × 1,013.15
4. Step 4: Simplify right side
   1,669.71x = 2,538,338.55
5. Step 5: Solve for x
   x = 2,538,338.55/1,669.71
6. Step 6: Final answer
   x = 1,520.23