Finding the Fourth Proportional to 2,111.13, 3,162.78 and 1,415.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.13 : 3,162.78 = 1,415.75 : x
2. Step 2: Convert to fraction form
   2,111.13/3,162.78 = 1,415.75/x
3. Step 3: Cross multiply
   2,111.13x = 3,162.78 × 1,415.75
4. Step 4: Simplify right side
   2,111.13x = 4,477,705.79
5. Step 5: Solve for x
   x = 4,477,705.79/2,111.13
6. Step 6: Final answer
   x = 2,121.00