Finding the Fourth Proportional to 2,196.25, 3,030.68 and 1,312.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.25 : 3,030.68 = 1,312.07 : x
2. Step 2: Convert to fraction form
   2,196.25/3,030.68 = 1,312.07/x
3. Step 3: Cross multiply
   2,196.25x = 3,030.68 × 1,312.07
4. Step 4: Simplify right side
   2,196.25x = 3,976,452.43
5. Step 5: Solve for x
   x = 3,976,452.43/2,196.25
6. Step 6: Final answer
   x = 1,810.57