Finding the Fourth Proportional to 1,013.94, 1,513.58 and 890.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.94 : 1,513.58 = 890.93 : x
2. Step 2: Convert to fraction form
   1,013.94/1,513.58 = 890.93/x
3. Step 3: Cross multiply
   1,013.94x = 1,513.58 × 890.93
4. Step 4: Simplify right side
   1,013.94x = 1,348,493.16
5. Step 5: Solve for x
   x = 1,348,493.16/1,013.94
6. Step 6: Final answer
   x = 1,329.95