Finding the Fourth Proportional to 5,112.42, 7,667.01 and 2,187.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112.42 : 7,667.01 = 2,187.78 : x
2. Step 2: Convert to fraction form
   5,112.42/7,667.01 = 2,187.78/x
3. Step 3: Cross multiply
   5,112.42x = 7,667.01 × 2,187.78
4. Step 4: Simplify right side
   5,112.42x = 16,773,731.14
5. Step 5: Solve for x
   x = 16,773,731.14/5,112.42
6. Step 6: Final answer
   x = 3,280.98