Finding the Fourth Proportional to 2,007.30, 2,770.80 and 1,261.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.30 : 2,770.80 = 1,261.56 : x
2. Step 2: Convert to fraction form
   2,007.30/2,770.80 = 1,261.56/x
3. Step 3: Cross multiply
   2,007.30x = 2,770.80 × 1,261.56
4. Step 4: Simplify right side
   2,007.30x = 3,495,530.45
5. Step 5: Solve for x
   x = 3,495,530.45/2,007.30
6. Step 6: Final answer
   x = 1,741.41