Finding the Fourth Proportional to 2,130.40, 3,196.83 and 897.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.40 : 3,196.83 = 897.72 : x
2. Step 2: Convert to fraction form
   2,130.40/3,196.83 = 897.72/x
3. Step 3: Cross multiply
   2,130.40x = 3,196.83 × 897.72
4. Step 4: Simplify right side
   2,130.40x = 2,869,849.61
5. Step 5: Solve for x
   x = 2,869,849.61/2,130.40
6. Step 6: Final answer
   x = 1,347.09