Finding the Fourth Proportional to 1,210.32, 1,667.97 and 836.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210.32 : 1,667.97 = 836.63 : x
2. Step 2: Convert to fraction form
   1,210.32/1,667.97 = 836.63/x
3. Step 3: Cross multiply
   1,210.32x = 1,667.97 × 836.63
4. Step 4: Simplify right side
   1,210.32x = 1,395,469.30
5. Step 5: Solve for x
   x = 1,395,469.30/1,210.32
6. Step 6: Final answer
   x = 1,152.98