Finding the Fourth Proportional to 2,172.91, 3,258.72 and 940.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.91 : 3,258.72 = 940.02 : x
2. Step 2: Convert to fraction form
   2,172.91/3,258.72 = 940.02/x
3. Step 3: Cross multiply
   2,172.91x = 3,258.72 × 940.02
4. Step 4: Simplify right side
   2,172.91x = 3,063,261.97
5. Step 5: Solve for x
   x = 3,063,261.97/2,172.91
6. Step 6: Final answer
   x = 1,409.75