Finding the Fourth Proportional to 3,870.45, 5,341.20 and 2,191.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.45 : 5,341.20 = 2,191.86 : x
2. Step 2: Convert to fraction form
   3,870.45/5,341.20 = 2,191.86/x
3. Step 3: Cross multiply
   3,870.45x = 5,341.20 × 2,191.86
4. Step 4: Simplify right side
   3,870.45x = 11,707,162.63
5. Step 5: Solve for x
   x = 11,707,162.63/3,870.45
6. Step 6: Final answer
   x = 3,024.75