Finding the Fourth Proportional to 2,100.34, 3,150.21 and 713.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.34 : 3,150.21 = 713.72 : x
2. Step 2: Convert to fraction form
   2,100.34/3,150.21 = 713.72/x
3. Step 3: Cross multiply
   2,100.34x = 3,150.21 × 713.72
4. Step 4: Simplify right side
   2,100.34x = 2,248,374.42
5. Step 5: Solve for x
   x = 2,248,374.42/2,100.34
6. Step 6: Final answer
   x = 1,070.48