Finding the Fourth Proportional to 2,142.72, 3,213.88 and 910.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.72 : 3,213.88 = 910.10 : x
2. Step 2: Convert to fraction form
   2,142.72/3,213.88 = 910.10/x
3. Step 3: Cross multiply
   2,142.72x = 3,213.88 × 910.10
4. Step 4: Simplify right side
   2,142.72x = 2,924,957.95
5. Step 5: Solve for x
   x = 2,924,957.95/2,142.72
6. Step 6: Final answer
   x = 1,365.07