Finding the Fourth Proportional to 1,112.84, 1,535.39 and 670.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.84 : 1,535.39 = 670.71 : x
2. Step 2: Convert to fraction form
   1,112.84/1,535.39 = 670.71/x
3. Step 3: Cross multiply
   1,112.84x = 1,535.39 × 670.71
4. Step 4: Simplify right side
   1,112.84x = 1,029,806.35
5. Step 5: Solve for x
   x = 1,029,806.35/1,112.84
6. Step 6: Final answer
   x = 925.39