Finding the Fourth Proportional to 2,071.59, 3,108.20 and 772.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.59 : 3,108.20 = 772.76 : x
2. Step 2: Convert to fraction form
   2,071.59/3,108.20 = 772.76/x
3. Step 3: Cross multiply
   2,071.59x = 3,108.20 × 772.76
4. Step 4: Simplify right side
   2,071.59x = 2,401,873.23
5. Step 5: Solve for x
   x = 2,401,873.23/2,071.59
6. Step 6: Final answer
   x = 1,159.43