Finding the Fourth Proportional to 2,106.86, 3,160.17 and 1,007.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.86 : 3,160.17 = 1,007.89 : x
2. Step 2: Convert to fraction form
   2,106.86/3,160.17 = 1,007.89/x
3. Step 3: Cross multiply
   2,106.86x = 3,160.17 × 1,007.89
4. Step 4: Simplify right side
   2,106.86x = 3,185,095.84
5. Step 5: Solve for x
   x = 3,185,095.84/2,106.86
6. Step 6: Final answer
   x = 1,511.78