Finding the Fourth Proportional to 1,425.76, 1,966.35 and 928.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.76 : 1,966.35 = 928.02 : x
2. Step 2: Convert to fraction form
   1,425.76/1,966.35 = 928.02/x
3. Step 3: Cross multiply
   1,425.76x = 1,966.35 × 928.02
4. Step 4: Simplify right side
   1,425.76x = 1,824,802.30
5. Step 5: Solve for x
   x = 1,824,802.30/1,425.76
6. Step 6: Final answer
   x = 1,279.88