Finding the Fourth Proportional to 2,196.61, 3,294.09 and 947.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.61 : 3,294.09 = 947.09 : x
2. Step 2: Convert to fraction form
   2,196.61/3,294.09 = 947.09/x
3. Step 3: Cross multiply
   2,196.61x = 3,294.09 × 947.09
4. Step 4: Simplify right side
   2,196.61x = 3,119,799.70
5. Step 5: Solve for x
   x = 3,119,799.70/2,196.61
6. Step 6: Final answer
   x = 1,420.28