Finding the Fourth Proportional to 1,445.10, 1,995.33 and 947.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.10 : 1,995.33 = 947.55 : x
2. Step 2: Convert to fraction form
   1,445.10/1,995.33 = 947.55/x
3. Step 3: Cross multiply
   1,445.10x = 1,995.33 × 947.55
4. Step 4: Simplify right side
   1,445.10x = 1,890,674.94
5. Step 5: Solve for x
   x = 1,890,674.94/1,445.10
6. Step 6: Final answer
   x = 1,308.34