Finding the Fourth Proportional to 2,146.95, 2,961.70 and 1,261.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.95 : 2,961.70 = 1,261.89 : x
2. Step 2: Convert to fraction form
   2,146.95/2,961.70 = 1,261.89/x
3. Step 3: Cross multiply
   2,146.95x = 2,961.70 × 1,261.89
4. Step 4: Simplify right side
   2,146.95x = 3,737,336.46
5. Step 5: Solve for x
   x = 3,737,336.46/2,146.95
6. Step 6: Final answer
   x = 1,740.77