Finding the Fourth Proportional to 8,271.60, 12,379.05 and 4,987.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.60 : 12,379.05 = 4,987.05 : x
2. Step 2: Convert to fraction form
   8,271.60/12,379.05 = 4,987.05/x
3. Step 3: Cross multiply
   8,271.60x = 12,379.05 × 4,987.05
4. Step 4: Simplify right side
   8,271.60x = 61,734,941.30
5. Step 5: Solve for x
   x = 61,734,941.30/8,271.60
6. Step 6: Final answer
   x = 7,463.48