Finding the Fourth Proportional to 2,128.90, 3,192.33 and 742.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.90 : 3,192.33 = 742.32 : x
2. Step 2: Convert to fraction form
   2,128.90/3,192.33 = 742.32/x
3. Step 3: Cross multiply
   2,128.90x = 3,192.33 × 742.32
4. Step 4: Simplify right side
   2,128.90x = 2,369,730.41
5. Step 5: Solve for x
   x = 2,369,730.41/2,128.90
6. Step 6: Final answer
   x = 1,113.12