Finding the Fourth Proportional to 2,196.70, 3,030.26 and 1,535.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.70 : 3,030.26 = 1,535.20 : x
2. Step 2: Convert to fraction form
   2,196.70/3,030.26 = 1,535.20/x
3. Step 3: Cross multiply
   2,196.70x = 3,030.26 × 1,535.20
4. Step 4: Simplify right side
   2,196.70x = 4,652,055.15
5. Step 5: Solve for x
   x = 4,652,055.15/2,196.70
6. Step 6: Final answer
   x = 2,117.75