Finding the Fourth Proportional to 1,715.90, 2,567.69 and 1,485.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.90 : 2,567.69 = 1,485.58 : x
2. Step 2: Convert to fraction form
   1,715.90/2,567.69 = 1,485.58/x
3. Step 3: Cross multiply
   1,715.90x = 2,567.69 × 1,485.58
4. Step 4: Simplify right side
   1,715.90x = 3,814,496.07
5. Step 5: Solve for x
   x = 3,814,496.07/1,715.90
6. Step 6: Final answer
   x = 2,223.04