Finding the Fourth Proportional to 2,070.59, 3,106.15 and 771.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.59 : 3,106.15 = 771.89 : x
2. Step 2: Convert to fraction form
   2,070.59/3,106.15 = 771.89/x
3. Step 3: Cross multiply
   2,070.59x = 3,106.15 × 771.89
4. Step 4: Simplify right side
   2,070.59x = 2,397,588.66
5. Step 5: Solve for x
   x = 2,397,588.66/2,070.59
6. Step 6: Final answer
   x = 1,157.93