Finding the Fourth Proportional to 2,322.72, 3,484.84 and 861.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,322.72 : 3,484.84 = 861.98 : x
2. Step 2: Convert to fraction form
   2,322.72/3,484.84 = 861.98/x
3. Step 3: Cross multiply
   2,322.72x = 3,484.84 × 861.98
4. Step 4: Simplify right side
   2,322.72x = 3,003,862.38
5. Step 5: Solve for x
   x = 3,003,862.38/2,322.72
6. Step 6: Final answer
   x = 1,293.25