Finding the Fourth Proportional to 2,652.51, 3,978.86 and 704.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,652.51 : 3,978.86 = 704.72 : x
2. Step 2: Convert to fraction form
   2,652.51/3,978.86 = 704.72/x
3. Step 3: Cross multiply
   2,652.51x = 3,978.86 × 704.72
4. Step 4: Simplify right side
   2,652.51x = 2,803,958.80
5. Step 5: Solve for x
   x = 2,803,958.80/2,652.51
6. Step 6: Final answer
   x = 1,057.10