Finding the Fourth Proportional to 1,568.02, 2,163.72 and 869.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.02 : 2,163.72 = 869.38 : x
2. Step 2: Convert to fraction form
   1,568.02/2,163.72 = 869.38/x
3. Step 3: Cross multiply
   1,568.02x = 2,163.72 × 869.38
4. Step 4: Simplify right side
   1,568.02x = 1,881,094.89
5. Step 5: Solve for x
   x = 1,881,094.89/1,568.02
6. Step 6: Final answer
   x = 1,199.66