Finding the Fourth Proportional to 1,388.16, 2,081.52 and 901.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.16 : 2,081.52 = 901.44 : x
2. Step 2: Convert to fraction form
   1,388.16/2,081.52 = 901.44/x
3. Step 3: Cross multiply
   1,388.16x = 2,081.52 × 901.44
4. Step 4: Simplify right side
   1,388.16x = 1,876,365.39
5. Step 5: Solve for x
   x = 1,876,365.39/1,388.16
6. Step 6: Final answer
   x = 1,351.69