Finding the Fourth Proportional to 1,142.32, 1,576.70 and 670.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.32 : 1,576.70 = 670.18 : x
2. Step 2: Convert to fraction form
   1,142.32/1,576.70 = 670.18/x
3. Step 3: Cross multiply
   1,142.32x = 1,576.70 × 670.18
4. Step 4: Simplify right side
   1,142.32x = 1,056,672.81
5. Step 5: Solve for x
   x = 1,056,672.81/1,142.32
6. Step 6: Final answer
   x = 925.02