Finding the Fourth Proportional to 3,870.09, 5,342.12 and 2,298.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.09 : 5,342.12 = 2,298.20 : x
2. Step 2: Convert to fraction form
   3,870.09/5,342.12 = 2,298.20/x
3. Step 3: Cross multiply
   3,870.09x = 5,342.12 × 2,298.20
4. Step 4: Simplify right side
   3,870.09x = 12,277,221.98
5. Step 5: Solve for x
   x = 12,277,221.98/3,870.09
6. Step 6: Final answer
   x = 3,172.34