Finding the Fourth Proportional to 1,434.87, 2,155.05 and 888.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.87 : 2,155.05 = 888.12 : x
2. Step 2: Convert to fraction form
   1,434.87/2,155.05 = 888.12/x
3. Step 3: Cross multiply
   1,434.87x = 2,155.05 × 888.12
4. Step 4: Simplify right side
   1,434.87x = 1,913,943.01
5. Step 5: Solve for x
   x = 1,913,943.01/1,434.87
6. Step 6: Final answer
   x = 1,333.88