Finding the Fourth Proportional to 1,359.59, 1,876.17 and 770.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.59 : 1,876.17 = 770.11 : x
2. Step 2: Convert to fraction form
   1,359.59/1,876.17 = 770.11/x
3. Step 3: Cross multiply
   1,359.59x = 1,876.17 × 770.11
4. Step 4: Simplify right side
   1,359.59x = 1,444,855.35
5. Step 5: Solve for x
   x = 1,444,855.35/1,359.59
6. Step 6: Final answer
   x = 1,062.71