Finding the Fourth Proportional to 1,200.23, 1,654.71 and 934.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.23 : 1,654.71 = 934.31 : x
2. Step 2: Convert to fraction form
   1,200.23/1,654.71 = 934.31/x
3. Step 3: Cross multiply
   1,200.23x = 1,654.71 × 934.31
4. Step 4: Simplify right side
   1,200.23x = 1,546,003.83
5. Step 5: Solve for x
   x = 1,546,003.83/1,200.23
6. Step 6: Final answer
   x = 1,288.10