Finding the Fourth Proportional to 2,415.10, 3,332.06 and 1,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.10 : 3,332.06 = 1,420.72 : x
2. Step 2: Convert to fraction form
   2,415.10/3,332.06 = 1,420.72/x
3. Step 3: Cross multiply
   2,415.10x = 3,332.06 × 1,420.72
4. Step 4: Simplify right side
   2,415.10x = 4,733,924.28
5. Step 5: Solve for x
   x = 4,733,924.28/2,415.10
6. Step 6: Final answer
   x = 1,960.14