Finding the Fourth Proportional to 2,900.05, 4,351.67 and 1,256.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,900.05 : 4,351.67 = 1,256.61 : x
2. Step 2: Convert to fraction form
   2,900.05/4,351.67 = 1,256.61/x
3. Step 3: Cross multiply
   2,900.05x = 4,351.67 × 1,256.61
4. Step 4: Simplify right side
   2,900.05x = 5,468,373.86
5. Step 5: Solve for x
   x = 5,468,373.86/2,900.05
6. Step 6: Final answer
   x = 1,885.61