Finding the Fourth Proportional to 2,047.48, 3,071.69 and 641.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,047.48 : 3,071.69 = 641.82 : x
2. Step 2: Convert to fraction form
   2,047.48/3,071.69 = 641.82/x
3. Step 3: Cross multiply
   2,047.48x = 3,071.69 × 641.82
4. Step 4: Simplify right side
   2,047.48x = 1,971,472.08
5. Step 5: Solve for x
   x = 1,971,472.08/2,047.48
6. Step 6: Final answer
   x = 962.88