Finding the Fourth Proportional to 1,693.25, 2,336.81 and 947.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,693.25 : 2,336.81 = 947.28 : x
2. Step 2: Convert to fraction form
   1,693.25/2,336.81 = 947.28/x
3. Step 3: Cross multiply
   1,693.25x = 2,336.81 × 947.28
4. Step 4: Simplify right side
   1,693.25x = 2,213,614.78
5. Step 5: Solve for x
   x = 2,213,614.78/1,693.25
6. Step 6: Final answer
   x = 1,307.31