Finding the Fourth Proportional to 12,191.60, 18,281.96 and 3,870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.60 : 18,281.96 = 3,870.08 : x
2. Step 2: Convert to fraction form
   12,191.60/18,281.96 = 3,870.08/x
3. Step 3: Cross multiply
   12,191.60x = 18,281.96 × 3,870.08
4. Step 4: Simplify right side
   12,191.60x = 70,752,647.76
5. Step 5: Solve for x
   x = 70,752,647.76/12,191.60
6. Step 6: Final answer
   x = 5,803.39