Finding the Fourth Proportional to 1,210.92, 1,670.82 and 837.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210.92 : 1,670.82 = 837.30 : x
2. Step 2: Convert to fraction form
   1,210.92/1,670.82 = 837.30/x
3. Step 3: Cross multiply
   1,210.92x = 1,670.82 × 837.30
4. Step 4: Simplify right side
   1,210.92x = 1,398,977.59
5. Step 5: Solve for x
   x = 1,398,977.59/1,210.92
6. Step 6: Final answer
   x = 1,155.30