Finding the Fourth Proportional to 1,013.35, 1,396.17 and 760.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.35 : 1,396.17 = 760.21 : x
2. Step 2: Convert to fraction form
   1,013.35/1,396.17 = 760.21/x
3. Step 3: Cross multiply
   1,013.35x = 1,396.17 × 760.21
4. Step 4: Simplify right side
   1,013.35x = 1,061,382.40
5. Step 5: Solve for x
   x = 1,061,382.40/1,013.35
6. Step 6: Final answer
   x = 1,047.40