Finding the Fourth Proportional to 1,142.32, 1,576.42 and 670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.32 : 1,576.42 = 670.50 : x
2. Step 2: Convert to fraction form
   1,142.32/1,576.42 = 670.50/x
3. Step 3: Cross multiply
   1,142.32x = 1,576.42 × 670.50
4. Step 4: Simplify right side
   1,142.32x = 1,056,989.61
5. Step 5: Solve for x
   x = 1,056,989.61/1,142.32
6. Step 6: Final answer
   x = 925.30