Finding the Fourth Proportional to 3,907.12, 5,393.60 and 2,492.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,907.12 : 5,393.60 = 2,492.72 : x
2. Step 2: Convert to fraction form
   3,907.12/5,393.60 = 2,492.72/x
3. Step 3: Cross multiply
   3,907.12x = 5,393.60 × 2,492.72
4. Step 4: Simplify right side
   3,907.12x = 13,444,734.59
5. Step 5: Solve for x
   x = 13,444,734.59/3,907.12
6. Step 6: Final answer
   x = 3,441.09