Finding the Fourth Proportional to 1,475.55, 2,039.17 and 1,209.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,475.55 : 2,039.17 = 1,209.57 : x
2. Step 2: Convert to fraction form
   1,475.55/2,039.17 = 1,209.57/x
3. Step 3: Cross multiply
   1,475.55x = 2,039.17 × 1,209.57
4. Step 4: Simplify right side
   1,475.55x = 2,466,518.86
5. Step 5: Solve for x
   x = 2,466,518.86/1,475.55
6. Step 6: Final answer
   x = 1,671.59