Finding the Fourth Proportional to 1,080.76, 1,491.06 and 976

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.76 : 1,491.06 = 976 : x
2. Step 2: Convert to fraction form
   1,080.76/1,491.06 = 976/x
3. Step 3: Cross multiply
   1,080.76x = 1,491.06 × 976
4. Step 4: Simplify right side
   1,080.76x = 1,455,274.56
5. Step 5: Solve for x
   x = 1,455,274.56/1,080.76
6. Step 6: Final answer
   x = 1,346.53