Finding the Fourth Proportional to 2,101.70, 3,152.52 and 715.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.70 : 3,152.52 = 715.02 : x
2. Step 2: Convert to fraction form
   2,101.70/3,152.52 = 715.02/x
3. Step 3: Cross multiply
   2,101.70x = 3,152.52 × 715.02
4. Step 4: Simplify right side
   2,101.70x = 2,254,103.03
5. Step 5: Solve for x
   x = 2,254,103.03/2,101.70
6. Step 6: Final answer
   x = 1,072.51