Finding the Fourth Proportional to 9,179.47, 12,667.82 and 4,987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,179.47 : 12,667.82 = 4,987.72 : x
2. Step 2: Convert to fraction form
   9,179.47/12,667.82 = 4,987.72/x
3. Step 3: Cross multiply
   9,179.47x = 12,667.82 × 4,987.72
4. Step 4: Simplify right side
   9,179.47x = 63,183,539.17
5. Step 5: Solve for x
   x = 63,183,539.17/9,179.47
6. Step 6: Final answer
   x = 6,883.14