Finding the Fourth Proportional to 1,300.32, 1,792.56 and 989.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.32 : 1,792.56 = 989.28 : x
2. Step 2: Convert to fraction form
   1,300.32/1,792.56 = 989.28/x
3. Step 3: Cross multiply
   1,300.32x = 1,792.56 × 989.28
4. Step 4: Simplify right side
   1,300.32x = 1,773,343.76
5. Step 5: Solve for x
   x = 1,773,343.76/1,300.32
6. Step 6: Final answer
   x = 1,363.77