Finding the Fourth Proportional to 3,918.47, 5,870.01 and 2,271.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.47 : 5,870.01 = 2,271.55 : x
2. Step 2: Convert to fraction form
   3,918.47/5,870.01 = 2,271.55/x
3. Step 3: Cross multiply
   3,918.47x = 5,870.01 × 2,271.55
4. Step 4: Simplify right side
   3,918.47x = 13,334,009.86
5. Step 5: Solve for x
   x = 13,334,009.86/3,918.47
6. Step 6: Final answer
   x = 3,402.87