Finding the Fourth Proportional to 1,112.81, 1,535.81 and 670.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.81 : 1,535.81 = 670.69 : x
2. Step 2: Convert to fraction form
   1,112.81/1,535.81 = 670.69/x
3. Step 3: Cross multiply
   1,112.81x = 1,535.81 × 670.69
4. Step 4: Simplify right side
   1,112.81x = 1,030,041.38
5. Step 5: Solve for x
   x = 1,030,041.38/1,112.81
6. Step 6: Final answer
   x = 925.62