Finding the Fourth Proportional to 1,112.63, 1,673.58 and 928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.63 : 1,673.58 = 928.10 : x
2. Step 2: Convert to fraction form
   1,112.63/1,673.58 = 928.10/x
3. Step 3: Cross multiply
   1,112.63x = 1,673.58 × 928.10
4. Step 4: Simplify right side
   1,112.63x = 1,553,249.60
5. Step 5: Solve for x
   x = 1,553,249.60/1,112.63
6. Step 6: Final answer
   x = 1,396.02