Finding the Fourth Proportional to 2,100.69, 3,149.78 and 1,929.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.69 : 3,149.78 = 1,929.33 : x
2. Step 2: Convert to fraction form
   2,100.69/3,149.78 = 1,929.33/x
3. Step 3: Cross multiply
   2,100.69x = 3,149.78 × 1,929.33
4. Step 4: Simplify right side
   2,100.69x = 6,076,955.40
5. Step 5: Solve for x
   x = 6,076,955.40/2,100.69
6. Step 6: Final answer
   x = 2,892.84