Finding the Fourth Proportional to 1,359.54, 1,876.20 and 770.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.54 : 1,876.20 = 770.07 : x
2. Step 2: Convert to fraction form
   1,359.54/1,876.20 = 770.07/x
3. Step 3: Cross multiply
   1,359.54x = 1,876.20 × 770.07
4. Step 4: Simplify right side
   1,359.54x = 1,444,805.33
5. Step 5: Solve for x
   x = 1,444,805.33/1,359.54
6. Step 6: Final answer
   x = 1,062.72