Finding the Fourth Proportional to 4,667.72, 6,439.30 and 2,988.32

Step by Step Solution

1. Step 1: Write the proportion equation
   4,667.72 : 6,439.30 = 2,988.32 : x
2. Step 2: Convert to fraction form
   4,667.72/6,439.30 = 2,988.32/x
3. Step 3: Cross multiply
   4,667.72x = 6,439.30 × 2,988.32
4. Step 4: Simplify right side
   4,667.72x = 19,242,649.31
5. Step 5: Solve for x
   x = 19,242,649.31/4,667.72
6. Step 6: Final answer
   x = 4,122.50