Finding the Fourth Proportional to 2,689.86, 3,711.88 and 1,570.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.86 : 3,711.88 = 1,570.84 : x
2. Step 2: Convert to fraction form
   2,689.86/3,711.88 = 1,570.84/x
3. Step 3: Cross multiply
   2,689.86x = 3,711.88 × 1,570.84
4. Step 4: Simplify right side
   2,689.86x = 5,830,769.58
5. Step 5: Solve for x
   x = 5,830,769.58/2,689.86
6. Step 6: Final answer
   x = 2,167.69