Finding the Fourth Proportional to 1,387.01, 1,913.16 and 888.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.01 : 1,913.16 = 888.86 : x
2. Step 2: Convert to fraction form
   1,387.01/1,913.16 = 888.86/x
3. Step 3: Cross multiply
   1,387.01x = 1,913.16 × 888.86
4. Step 4: Simplify right side
   1,387.01x = 1,700,521.83
5. Step 5: Solve for x
   x = 1,700,521.83/1,387.01
6. Step 6: Final answer
   x = 1,226.04