Finding the Fourth Proportional to 2,196.32, 3,030.90 and 1,239.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.32 : 3,030.90 = 1,239.15 : x
2. Step 2: Convert to fraction form
   2,196.32/3,030.90 = 1,239.15/x
3. Step 3: Cross multiply
   2,196.32x = 3,030.90 × 1,239.15
4. Step 4: Simplify right side
   2,196.32x = 3,755,739.74
5. Step 5: Solve for x
   x = 3,755,739.74/2,196.32
6. Step 6: Final answer
   x = 1,710.02