Finding the Fourth Proportional to 1,680.27, 2,517.22 and 947.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.27 : 2,517.22 = 947.62 : x
2. Step 2: Convert to fraction form
   1,680.27/2,517.22 = 947.62/x
3. Step 3: Cross multiply
   1,680.27x = 2,517.22 × 947.62
4. Step 4: Simplify right side
   1,680.27x = 2,385,368.02
5. Step 5: Solve for x
   x = 2,385,368.02/1,680.27
6. Step 6: Final answer
   x = 1,419.63