Finding the Fourth Proportional to 1,142.71, 1,577.01 and 670.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.71 : 1,577.01 = 670.62 : x
2. Step 2: Convert to fraction form
   1,142.71/1,577.01 = 670.62/x
3. Step 3: Cross multiply
   1,142.71x = 1,577.01 × 670.62
4. Step 4: Simplify right side
   1,142.71x = 1,057,574.45
5. Step 5: Solve for x
   x = 1,057,574.45/1,142.71
6. Step 6: Final answer
   x = 925.50