Finding the Fourth Proportional to 1,242.63, 1,711.69 and 947.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.63 : 1,711.69 = 947.39 : x
2. Step 2: Convert to fraction form
   1,242.63/1,711.69 = 947.39/x
3. Step 3: Cross multiply
   1,242.63x = 1,711.69 × 947.39
4. Step 4: Simplify right side
   1,242.63x = 1,621,627.06
5. Step 5: Solve for x
   x = 1,621,627.06/1,242.63
6. Step 6: Final answer
   x = 1,305.00