Finding the Fourth Proportional to 2,667.79, 4,002.29 and 913.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.79 : 4,002.29 = 913.13 : x
2. Step 2: Convert to fraction form
   2,667.79/4,002.29 = 913.13/x
3. Step 3: Cross multiply
   2,667.79x = 4,002.29 × 913.13
4. Step 4: Simplify right side
   2,667.79x = 3,654,611.07
5. Step 5: Solve for x
   x = 3,654,611.07/2,667.79
6. Step 6: Final answer
   x = 1,369.90