Finding the Fourth Proportional to 1,365.65, 1,885.17 and 947.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,365.65 : 1,885.17 = 947.39 : x
2. Step 2: Convert to fraction form
   1,365.65/1,885.17 = 947.39/x
3. Step 3: Cross multiply
   1,365.65x = 1,885.17 × 947.39
4. Step 4: Simplify right side
   1,365.65x = 1,785,981.78
5. Step 5: Solve for x
   x = 1,785,981.78/1,365.65
6. Step 6: Final answer
   x = 1,307.79