Finding the Fourth Proportional to 1,406.76, 2,109.30 and 676.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.76 : 2,109.30 = 676.56 : x
2. Step 2: Convert to fraction form
   1,406.76/2,109.30 = 676.56/x
3. Step 3: Cross multiply
   1,406.76x = 2,109.30 × 676.56
4. Step 4: Simplify right side
   1,406.76x = 1,427,068.01
5. Step 5: Solve for x
   x = 1,427,068.01/1,406.76
6. Step 6: Final answer
   x = 1,014.44