Finding the Fourth Proportional to 2,128.17, 3,192.72 and 1,976.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.17 : 3,192.72 = 1,976.30 : x
2. Step 2: Convert to fraction form
   2,128.17/3,192.72 = 1,976.30/x
3. Step 3: Cross multiply
   2,128.17x = 3,192.72 × 1,976.30
4. Step 4: Simplify right side
   2,128.17x = 6,309,761.13
5. Step 5: Solve for x
   x = 6,309,761.13/2,128.17
6. Step 6: Final answer
   x = 2,964.87