Finding the Fourth Proportional to 1,365.68, 1,885.26 and 868.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,365.68 : 1,885.26 = 868.99 : x
2. Step 2: Convert to fraction form
   1,365.68/1,885.26 = 868.99/x
3. Step 3: Cross multiply
   1,365.68x = 1,885.26 × 868.99
4. Step 4: Simplify right side
   1,365.68x = 1,638,275.60
5. Step 5: Solve for x
   x = 1,638,275.60/1,365.68
6. Step 6: Final answer
   x = 1,199.61