Finding the Fourth Proportional to 2,196.88, 3,030.28 and 1,312

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.88 : 3,030.28 = 1,312 : x
2. Step 2: Convert to fraction form
   2,196.88/3,030.28 = 1,312/x
3. Step 3: Cross multiply
   2,196.88x = 3,030.28 × 1,312
4. Step 4: Simplify right side
   2,196.88x = 3,975,727.36
5. Step 5: Solve for x
   x = 3,975,727.36/2,196.88
6. Step 6: Final answer
   x = 1,809.72