Finding the Fourth Proportional to 1,042.53, 1,438.50 and 706.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.53 : 1,438.50 = 706.56 : x
2. Step 2: Convert to fraction form
   1,042.53/1,438.50 = 706.56/x
3. Step 3: Cross multiply
   1,042.53x = 1,438.50 × 706.56
4. Step 4: Simplify right side
   1,042.53x = 1,016,386.56
5. Step 5: Solve for x
   x = 1,016,386.56/1,042.53
6. Step 6: Final answer
   x = 974.92