Finding the Fourth Proportional to 9,179.55, 12,667.91 and 4,987.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,179.55 : 12,667.91 = 4,987.89 : x
2. Step 2: Convert to fraction form
   9,179.55/12,667.91 = 4,987.89/x
3. Step 3: Cross multiply
   9,179.55x = 12,667.91 × 4,987.89
4. Step 4: Simplify right side
   9,179.55x = 63,186,116.67
5. Step 5: Solve for x
   x = 63,186,116.67/9,179.55
6. Step 6: Final answer
   x = 6,883.36