Finding the Fourth Proportional to 1,535.31, 2,118.74 and 836.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.31 : 2,118.74 = 836.69 : x
2. Step 2: Convert to fraction form
   1,535.31/2,118.74 = 836.69/x
3. Step 3: Cross multiply
   1,535.31x = 2,118.74 × 836.69
4. Step 4: Simplify right side
   1,535.31x = 1,772,713.79
5. Step 5: Solve for x
   x = 1,772,713.79/1,535.31
6. Step 6: Final answer
   x = 1,154.63