Finding the Fourth Proportional to 1,057.82, 1,460.18 and 860.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.82 : 1,460.18 = 860.99 : x
2. Step 2: Convert to fraction form
   1,057.82/1,460.18 = 860.99/x
3. Step 3: Cross multiply
   1,057.82x = 1,460.18 × 860.99
4. Step 4: Simplify right side
   1,057.82x = 1,257,196.07
5. Step 5: Solve for x
   x = 1,257,196.07/1,057.82
6. Step 6: Final answer
   x = 1,188.48