Finding the Fourth Proportional to 2,653.98, 3,990.72 and 2,547.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.98 : 3,990.72 = 2,547.06 : x
2. Step 2: Convert to fraction form
   2,653.98/3,990.72 = 2,547.06/x
3. Step 3: Cross multiply
   2,653.98x = 3,990.72 × 2,547.06
4. Step 4: Simplify right side
   2,653.98x = 10,164,603.28
5. Step 5: Solve for x
   x = 10,164,603.28/2,653.98
6. Step 6: Final answer
   x = 3,829.95