Finding the Fourth Proportional to 2,120.76, 3,160.71 and 2,117.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.76 : 3,160.71 = 2,117.52 : x
2. Step 2: Convert to fraction form
   2,120.76/3,160.71 = 2,117.52/x
3. Step 3: Cross multiply
   2,120.76x = 3,160.71 × 2,117.52
4. Step 4: Simplify right side
   2,120.76x = 6,692,866.64
5. Step 5: Solve for x
   x = 6,692,866.64/2,120.76
6. Step 6: Final answer
   x = 3,155.88