Finding the Fourth Proportional to 2,210.47, 3,314.09 and 1,115.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.47 : 3,314.09 = 1,115.61 : x
2. Step 2: Convert to fraction form
   2,210.47/3,314.09 = 1,115.61/x
3. Step 3: Cross multiply
   2,210.47x = 3,314.09 × 1,115.61
4. Step 4: Simplify right side
   2,210.47x = 3,697,222.31
5. Step 5: Solve for x
   x = 3,697,222.31/2,210.47
6. Step 6: Final answer
   x = 1,672.60