Finding the Fourth Proportional to 2,153.55, 2,968.52 and 1,407.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.55 : 2,968.52 = 1,407.13 : x
2. Step 2: Convert to fraction form
   2,153.55/2,968.52 = 1,407.13/x
3. Step 3: Cross multiply
   2,153.55x = 2,968.52 × 1,407.13
4. Step 4: Simplify right side
   2,153.55x = 4,177,093.55
5. Step 5: Solve for x
   x = 4,177,093.55/2,153.55
6. Step 6: Final answer
   x = 1,939.63