Finding the Fourth Proportional to 1,142.96, 1,577.31 and 700.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.96 : 1,577.31 = 700.60 : x
2. Step 2: Convert to fraction form
   1,142.96/1,577.31 = 700.60/x
3. Step 3: Cross multiply
   1,142.96x = 1,577.31 × 700.60
4. Step 4: Simplify right side
   1,142.96x = 1,105,069.38
5. Step 5: Solve for x
   x = 1,105,069.38/1,142.96
6. Step 6: Final answer
   x = 966.85