Finding the Fourth Proportional to 1,778.91, 2,667.89 and 913.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.91 : 2,667.89 = 913.47 : x
2. Step 2: Convert to fraction form
   1,778.91/2,667.89 = 913.47/x
3. Step 3: Cross multiply
   1,778.91x = 2,667.89 × 913.47
4. Step 4: Simplify right side
   1,778.91x = 2,437,032.91
5. Step 5: Solve for x
   x = 2,437,032.91/1,778.91
6. Step 6: Final answer
   x = 1,369.96