Finding the Fourth Proportional to 1,283.31, 1,925.46 and 666.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,283.31 : 1,925.46 = 666.72 : x
2. Step 2: Convert to fraction form
   1,283.31/1,925.46 = 666.72/x
3. Step 3: Cross multiply
   1,283.31x = 1,925.46 × 666.72
4. Step 4: Simplify right side
   1,283.31x = 1,283,742.69
5. Step 5: Solve for x
   x = 1,283,742.69/1,283.31
6. Step 6: Final answer
   x = 1,000.34