Finding the Fourth Proportional to 2,116.62, 3,175.56 and 947.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.62 : 3,175.56 = 947.39 : x
2. Step 2: Convert to fraction form
   2,116.62/3,175.56 = 947.39/x
3. Step 3: Cross multiply
   2,116.62x = 3,175.56 × 947.39
4. Step 4: Simplify right side
   2,116.62x = 3,008,477.91
5. Step 5: Solve for x
   x = 3,008,477.91/2,116.62
6. Step 6: Final answer
   x = 1,421.36