Finding the Fourth Proportional to 1,406.72, 2,108.64 and 886.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.72 : 2,108.64 = 886.52 : x
2. Step 2: Convert to fraction form
   1,406.72/2,108.64 = 886.52/x
3. Step 3: Cross multiply
   1,406.72x = 2,108.64 × 886.52
4. Step 4: Simplify right side
   1,406.72x = 1,869,351.53
5. Step 5: Solve for x
   x = 1,869,351.53/1,406.72
6. Step 6: Final answer
   x = 1,328.87