Finding the Fourth Proportional to 1,366.68, 1,886.64 and 869.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.68 : 1,886.64 = 869.99 : x
2. Step 2: Convert to fraction form
   1,366.68/1,886.64 = 869.99/x
3. Step 3: Cross multiply
   1,366.68x = 1,886.64 × 869.99
4. Step 4: Simplify right side
   1,366.68x = 1,641,357.93
5. Step 5: Solve for x
   x = 1,641,357.93/1,366.68
6. Step 6: Final answer
   x = 1,200.98