Finding the Fourth Proportional to 5,172.18, 7,758.41 and 1,887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,172.18 : 7,758.41 = 1,887.72 : x
2. Step 2: Convert to fraction form
   5,172.18/7,758.41 = 1,887.72/x
3. Step 3: Cross multiply
   5,172.18x = 7,758.41 × 1,887.72
4. Step 4: Simplify right side
   5,172.18x = 14,645,705.73
5. Step 5: Solve for x
   x = 14,645,705.73/5,172.18
6. Step 6: Final answer
   x = 2,831.63