Finding the Fourth Proportional to 2,688.17, 4,031.79 and 713.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.17 : 4,031.79 = 713.82 : x
2. Step 2: Convert to fraction form
   2,688.17/4,031.79 = 713.82/x
3. Step 3: Cross multiply
   2,688.17x = 4,031.79 × 713.82
4. Step 4: Simplify right side
   2,688.17x = 2,877,972.34
5. Step 5: Solve for x
   x = 2,877,972.34/2,688.17
6. Step 6: Final answer
   x = 1,070.61