Finding the Fourth Proportional to 1,386.93, 1,913.68 and 882.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.93 : 1,913.68 = 882.99 : x
2. Step 2: Convert to fraction form
   1,386.93/1,913.68 = 882.99/x
3. Step 3: Cross multiply
   1,386.93x = 1,913.68 × 882.99
4. Step 4: Simplify right side
   1,386.93x = 1,689,760.30
5. Step 5: Solve for x
   x = 1,689,760.30/1,386.93
6. Step 6: Final answer
   x = 1,218.35