Finding the Fourth Proportional to 1,168.76, 1,613.58 and 776.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.76 : 1,613.58 = 776.12 : x
2. Step 2: Convert to fraction form
   1,168.76/1,613.58 = 776.12/x
3. Step 3: Cross multiply
   1,168.76x = 1,613.58 × 776.12
4. Step 4: Simplify right side
   1,168.76x = 1,252,331.71
5. Step 5: Solve for x
   x = 1,252,331.71/1,168.76
6. Step 6: Final answer
   x = 1,071.50