Finding the Fourth Proportional to 1,645.84, 2,271.54 and 947.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.84 : 2,271.54 = 947.62 : x
2. Step 2: Convert to fraction form
   1,645.84/2,271.54 = 947.62/x
3. Step 3: Cross multiply
   1,645.84x = 2,271.54 × 947.62
4. Step 4: Simplify right side
   1,645.84x = 2,152,556.73
5. Step 5: Solve for x
   x = 2,152,556.73/1,645.84
6. Step 6: Final answer
   x = 1,307.88