Finding the Fourth Proportional to 2,071.50, 3,107.28 and 772.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.50 : 3,107.28 = 772.98 : x
2. Step 2: Convert to fraction form
   2,071.50/3,107.28 = 772.98/x
3. Step 3: Cross multiply
   2,071.50x = 3,107.28 × 772.98
4. Step 4: Simplify right side
   2,071.50x = 2,401,865.29
5. Step 5: Solve for x
   x = 2,401,865.29/2,071.50
6. Step 6: Final answer
   x = 1,159.48