Finding the Fourth Proportional to 1,112.15, 1,534.72 and 614.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.15 : 1,534.72 = 614.78 : x
2. Step 2: Convert to fraction form
   1,112.15/1,534.72 = 614.78/x
3. Step 3: Cross multiply
   1,112.15x = 1,534.72 × 614.78
4. Step 4: Simplify right side
   1,112.15x = 943,515.16
5. Step 5: Solve for x
   x = 943,515.16/1,112.15
6. Step 6: Final answer
   x = 848.37