Finding the Fourth Proportional to 1,670.72, 2,304.88 and 1,081.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,670.72 : 2,304.88 = 1,081.32 : x
2. Step 2: Convert to fraction form
   1,670.72/2,304.88 = 1,081.32/x
3. Step 3: Cross multiply
   1,670.72x = 2,304.88 × 1,081.32
4. Step 4: Simplify right side
   1,670.72x = 2,492,312.84
5. Step 5: Solve for x
   x = 2,492,312.84/1,670.72
6. Step 6: Final answer
   x = 1,491.76