Finding the Fourth Proportional to 2,595.52, 3,893.06 and 647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,595.52 : 3,893.06 = 647.72 : x
2. Step 2: Convert to fraction form
   2,595.52/3,893.06 = 647.72/x
3. Step 3: Cross multiply
   2,595.52x = 3,893.06 × 647.72
4. Step 4: Simplify right side
   2,595.52x = 2,521,612.82
5. Step 5: Solve for x
   x = 2,521,612.82/2,595.52
6. Step 6: Final answer
   x = 971.53