Finding the Fourth Proportional to 5,100.72, 7,041.60 and 3,212.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,100.72 : 7,041.60 = 3,212.88 : x
2. Step 2: Convert to fraction form
   5,100.72/7,041.60 = 3,212.88/x
3. Step 3: Cross multiply
   5,100.72x = 7,041.60 × 3,212.88
4. Step 4: Simplify right side
   5,100.72x = 22,623,815.81
5. Step 5: Solve for x
   x = 22,623,815.81/5,100.72
6. Step 6: Final answer
   x = 4,435.42