Finding the Fourth Proportional to 2,160.56, 2,981.59 and 1,415.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.56 : 2,981.59 = 1,415.77 : x
2. Step 2: Convert to fraction form
   2,160.56/2,981.59 = 1,415.77/x
3. Step 3: Cross multiply
   2,160.56x = 2,981.59 × 1,415.77
4. Step 4: Simplify right side
   2,160.56x = 4,221,234.68
5. Step 5: Solve for x
   x = 4,221,234.68/2,160.56
6. Step 6: Final answer
   x = 1,953.77