Finding the Fourth Proportional to 2,415.56, 3,624.98 and 1,320.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.56 : 3,624.98 = 1,320.72 : x
2. Step 2: Convert to fraction form
   2,415.56/3,624.98 = 1,320.72/x
3. Step 3: Cross multiply
   2,415.56x = 3,624.98 × 1,320.72
4. Step 4: Simplify right side
   2,415.56x = 4,787,583.59
5. Step 5: Solve for x
   x = 4,787,583.59/2,415.56
6. Step 6: Final answer
   x = 1,981.98