Finding the Fourth Proportional to 1,359.55, 1,876.05 and 770.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.55 : 1,876.05 = 770.08 : x
2. Step 2: Convert to fraction form
   1,359.55/1,876.05 = 770.08/x
3. Step 3: Cross multiply
   1,359.55x = 1,876.05 × 770.08
4. Step 4: Simplify right side
   1,359.55x = 1,444,717.19
5. Step 5: Solve for x
   x = 1,444,717.19/1,359.55
6. Step 6: Final answer
   x = 1,062.64