Finding the Fourth Proportional to 1,784.64, 2,670.48 and 1,236.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.64 : 2,670.48 = 1,236.72 : x
2. Step 2: Convert to fraction form
   1,784.64/2,670.48 = 1,236.72/x
3. Step 3: Cross multiply
   1,784.64x = 2,670.48 × 1,236.72
4. Step 4: Simplify right side
   1,784.64x = 3,302,636.03
5. Step 5: Solve for x
   x = 3,302,636.03/1,784.64
6. Step 6: Final answer
   x = 1,850.59