Finding the Fourth Proportional to 3,751.60, 5,179.80 and 2,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,751.60 : 5,179.80 = 2,428.72 : x
2. Step 2: Convert to fraction form
   3,751.60/5,179.80 = 2,428.72/x
3. Step 3: Cross multiply
   3,751.60x = 5,179.80 × 2,428.72
4. Step 4: Simplify right side
   3,751.60x = 12,580,283.86
5. Step 5: Solve for x
   x = 12,580,283.86/3,751.60
6. Step 6: Final answer
   x = 3,353.31