Finding the Fourth Proportional to 1,142.52, 1,576.71 and 670.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.52 : 1,576.71 = 670.38 : x
2. Step 2: Convert to fraction form
   1,142.52/1,576.71 = 670.38/x
3. Step 3: Cross multiply
   1,142.52x = 1,576.71 × 670.38
4. Step 4: Simplify right side
   1,142.52x = 1,056,994.85
5. Step 5: Solve for x
   x = 1,056,994.85/1,142.52
6. Step 6: Final answer
   x = 925.14