Finding the Fourth Proportional to 1,860.18, 2,789.34 and 764.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.18 : 2,789.34 = 764.25 : x
2. Step 2: Convert to fraction form
   1,860.18/2,789.34 = 764.25/x
3. Step 3: Cross multiply
   1,860.18x = 2,789.34 × 764.25
4. Step 4: Simplify right side
   1,860.18x = 2,131,753.10
5. Step 5: Solve for x
   x = 2,131,753.10/1,860.18
6. Step 6: Final answer
   x = 1,145.99