Finding the Fourth Proportional to 30,787.47, 42,486.72 and 16,640.27

Step by Step Solution

1. Step 1: Write the proportion equation
   30,787.47 : 42,486.72 = 16,640.27 : x
2. Step 2: Convert to fraction form
   30,787.47/42,486.72 = 16,640.27/x
3. Step 3: Cross multiply
   30,787.47x = 42,486.72 × 16,640.27
4. Step 4: Simplify right side
   30,787.47x = 706,990,409.01
5. Step 5: Solve for x
   x = 706,990,409.01/30,787.47
6. Step 6: Final answer
   x = 22,963.58