Finding the Fourth Proportional to 2,196.40, 3,030.76 and 1,312.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.40 : 3,030.76 = 1,312.01 : x
2. Step 2: Convert to fraction form
   2,196.40/3,030.76 = 1,312.01/x
3. Step 3: Cross multiply
   2,196.40x = 3,030.76 × 1,312.01
4. Step 4: Simplify right side
   2,196.40x = 3,976,387.43
5. Step 5: Solve for x
   x = 3,976,387.43/2,196.40
6. Step 6: Final answer
   x = 1,810.41