Finding the Fourth Proportional to 1,299.90, 1,948.72 and 568.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,299.90 : 1,948.72 = 568.92 : x
2. Step 2: Convert to fraction form
   1,299.90/1,948.72 = 568.92/x
3. Step 3: Cross multiply
   1,299.90x = 1,948.72 × 568.92
4. Step 4: Simplify right side
   1,299.90x = 1,108,665.78
5. Step 5: Solve for x
   x = 1,108,665.78/1,299.90
6. Step 6: Final answer
   x = 852.89