Finding the Fourth Proportional to 2,196.12, 3,030.70 and 1,312.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.12 : 3,030.70 = 1,312.43 : x
2. Step 2: Convert to fraction form
   2,196.12/3,030.70 = 1,312.43/x
3. Step 3: Cross multiply
   2,196.12x = 3,030.70 × 1,312.43
4. Step 4: Simplify right side
   2,196.12x = 3,977,581.60
5. Step 5: Solve for x
   x = 3,977,581.60/2,196.12
6. Step 6: Final answer
   x = 1,811.19