Finding the Fourth Proportional to 1,359.99, 1,877.06 and 770.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.99 : 1,877.06 = 770.72 : x
2. Step 2: Convert to fraction form
   1,359.99/1,877.06 = 770.72/x
3. Step 3: Cross multiply
   1,359.99x = 1,877.06 × 770.72
4. Step 4: Simplify right side
   1,359.99x = 1,446,674.44
5. Step 5: Solve for x
   x = 1,446,674.44/1,359.99
6. Step 6: Final answer
   x = 1,063.74