Finding the Fourth Proportional to 1,771.42, 2,667.43 and 1,312.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,771.42 : 2,667.43 = 1,312.46 : x
2. Step 2: Convert to fraction form
   1,771.42/2,667.43 = 1,312.46/x
3. Step 3: Cross multiply
   1,771.42x = 2,667.43 × 1,312.46
4. Step 4: Simplify right side
   1,771.42x = 3,500,895.18
5. Step 5: Solve for x
   x = 3,500,895.18/1,771.42
6. Step 6: Final answer
   x = 1,976.32