Finding the Fourth Proportional to 1,209.83, 1,667.84 and 947.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.83 : 1,667.84 = 947.39 : x
2. Step 2: Convert to fraction form
   1,209.83/1,667.84 = 947.39/x
3. Step 3: Cross multiply
   1,209.83x = 1,667.84 × 947.39
4. Step 4: Simplify right side
   1,209.83x = 1,580,081.86
5. Step 5: Solve for x
   x = 1,580,081.86/1,209.83
6. Step 6: Final answer
   x = 1,306.04