Finding the Fourth Proportional to 1,012.35, 1,397.15 and 614.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.35 : 1,397.15 = 614.22 : x
2. Step 2: Convert to fraction form
   1,012.35/1,397.15 = 614.22/x
3. Step 3: Cross multiply
   1,012.35x = 1,397.15 × 614.22
4. Step 4: Simplify right side
   1,012.35x = 858,154.40
5. Step 5: Solve for x
   x = 858,154.40/1,012.35
6. Step 6: Final answer
   x = 847.69