Finding the Fourth Proportional to 1,388.45, 1,924.84 and 1,314.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.45 : 1,924.84 = 1,314.47 : x
2. Step 2: Convert to fraction form
   1,388.45/1,924.84 = 1,314.47/x
3. Step 3: Cross multiply
   1,388.45x = 1,924.84 × 1,314.47
4. Step 4: Simplify right side
   1,388.45x = 2,530,144.43
5. Step 5: Solve for x
   x = 2,530,144.43/1,388.45
6. Step 6: Final answer
   x = 1,822.28