Finding the Fourth Proportional to 2,071.04, 3,105.60 and 772.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.04 : 3,105.60 = 772.16 : x
2. Step 2: Convert to fraction form
   2,071.04/3,105.60 = 772.16/x
3. Step 3: Cross multiply
   2,071.04x = 3,105.60 × 772.16
4. Step 4: Simplify right side
   2,071.04x = 2,398,020.10
5. Step 5: Solve for x
   x = 2,398,020.10/2,071.04
6. Step 6: Final answer
   x = 1,157.88