Finding the Fourth Proportional to 2,128.02, 3,191.40 and 741.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.02 : 3,191.40 = 741.30 : x
2. Step 2: Convert to fraction form
   2,128.02/3,191.40 = 741.30/x
3. Step 3: Cross multiply
   2,128.02x = 3,191.40 × 741.30
4. Step 4: Simplify right side
   2,128.02x = 2,365,784.82
5. Step 5: Solve for x
   x = 2,365,784.82/2,128.02
6. Step 6: Final answer
   x = 1,111.73