Finding the Fourth Proportional to 1,359.72, 1,875.96 and 770.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.72 : 1,875.96 = 770.18 : x
2. Step 2: Convert to fraction form
   1,359.72/1,875.96 = 770.18/x
3. Step 3: Cross multiply
   1,359.72x = 1,875.96 × 770.18
4. Step 4: Simplify right side
   1,359.72x = 1,444,817.49
5. Step 5: Solve for x
   x = 1,444,817.49/1,359.72
6. Step 6: Final answer
   x = 1,062.58