Finding the Fourth Proportional to 5,725.12, 7,900.86 and 3,601.36

Step by Step Solution

1. Step 1: Write the proportion equation
   5,725.12 : 7,900.86 = 3,601.36 : x
2. Step 2: Convert to fraction form
   5,725.12/7,900.86 = 3,601.36/x
3. Step 3: Cross multiply
   5,725.12x = 7,900.86 × 3,601.36
4. Step 4: Simplify right side
   5,725.12x = 28,453,841.17
5. Step 5: Solve for x
   x = 28,453,841.17/5,725.12
6. Step 6: Final answer
   x = 4,970.00