Finding the Fourth Proportional to 1,645.52, 2,270.80 and 947.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.52 : 2,270.80 = 947.04 : x
2. Step 2: Convert to fraction form
   1,645.52/2,270.80 = 947.04/x
3. Step 3: Cross multiply
   1,645.52x = 2,270.80 × 947.04
4. Step 4: Simplify right side
   1,645.52x = 2,150,538.43
5. Step 5: Solve for x
   x = 2,150,538.43/1,645.52
6. Step 6: Final answer
   x = 1,306.91