Finding the Fourth Proportional to 1,667.86, 2,503.20 and 1,120.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.86 : 2,503.20 = 1,120.70 : x
2. Step 2: Convert to fraction form
   1,667.86/2,503.20 = 1,120.70/x
3. Step 3: Cross multiply
   1,667.86x = 2,503.20 × 1,120.70
4. Step 4: Simplify right side
   1,667.86x = 2,805,346.70
5. Step 5: Solve for x
   x = 2,805,346.70/1,667.86
6. Step 6: Final answer
   x = 1,682.01