Finding the Fourth Proportional to 2,667.76, 3,998.90 and 1,023.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.76 : 3,998.90 = 1,023.88 : x
2. Step 2: Convert to fraction form
   2,667.76/3,998.90 = 1,023.88/x
3. Step 3: Cross multiply
   2,667.76x = 3,998.90 × 1,023.88
4. Step 4: Simplify right side
   2,667.76x = 4,094,393.73
5. Step 5: Solve for x
   x = 4,094,393.73/2,667.76
6. Step 6: Final answer
   x = 1,534.77