Finding the Fourth Proportional to 2,653.98, 3,980.70 and 706.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.98 : 3,980.70 = 706.38 : x
2. Step 2: Convert to fraction form
   2,653.98/3,980.70 = 706.38/x
3. Step 3: Cross multiply
   2,653.98x = 3,980.70 × 706.38
4. Step 4: Simplify right side
   2,653.98x = 2,811,886.87
5. Step 5: Solve for x
   x = 2,811,886.87/2,653.98
6. Step 6: Final answer
   x = 1,059.50