Finding the Fourth Proportional to 1,077.48, 1,486.06 and 704.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.48 : 1,486.06 = 704.58 : x
2. Step 2: Convert to fraction form
   1,077.48/1,486.06 = 704.58/x
3. Step 3: Cross multiply
   1,077.48x = 1,486.06 × 704.58
4. Step 4: Simplify right side
   1,077.48x = 1,047,048.15
5. Step 5: Solve for x
   x = 1,047,048.15/1,077.48
6. Step 6: Final answer
   x = 971.76